The classification of economic activities into primary, tertiary and secondary is useful on account of the information it provides on how and where the people of a country are employed. also this helps in ascertaining as to which sector of economic activity contributes more or less to the country’s GDP and per capita income.

If the tertiary sector is developing much faster than the primary sector, then it implies that agriculture is depleting, and the government must take measures to rectify this. The knowledge that the agricultural profession is becoming unpopular or regressive can only come if we know which sector it belongs to. Hence it is necessary to classify economic activities into these there sectors for smooth economic administration and development. 

For each of the sectors that we came across in this chapter, one should focus on employment and GDP because these determine the size of a country's economy. A focus on employment and GDP helps determine two important things- per capita income and productivity. Hence, in each of the three sectors, employment rate and status as well as its contribution to the GDP help us understand how that particular sector is functioning and what needs to be done to initiate further growth in it.
Yes, the other issues which should be examined are -
→ Balanced regional development
→ Equality in income and wealth among the people of the country.
→ How to eradicate poverty
→ Modernization of technology
→ Self-reliance of the country
→ How to achieve surplus food production in the country.

The tertiary sector different from other two sectors. This is because other two sectors produce goods but, this sector does not produce goods by itself. But the activities under this sector help in the development of the primary and secondary sectors. These activities are an aid or support for the production process. For example, transport, communication, storage, banking, insurance, trade activities etc. For this reason this sector is also known as service sector. 

Disguised Unemployment is a kind of unemployment in which there are people who are visibly employed but are actually unemployed. This situation is also known as Hidden Unemployment.In such a situation more people are engaged in a work than required.
For example:
→ In rural areas, this type of unemployment is generally found in agricultural sector like - in a family of 9 people all are engaged in the same agricultural plot. But if 4 people are with drawn from it there will be no reduction in output. So, these 4 people are actually disguisedly employed.
→ In urban areas, this type of unemployment can be seen mostly in service sectors such as in a family all members are engaged in one petty shop or a small business which can be managed by less number of persons.

Open Unemployment	Disguised unemployment
When a country�s labour force do not get opportunities for adequate employment, this situation is called open unemployment.	This is a kind of unemployment in which there are people who are visibly employed but actually they don�t have full employment. In such a situation more people are engaged in a work than required.
This type of unemployment is generally found in the industrial sector of our country. This is also found among the landless agricultural labourers in rural areas.	This type of unemployment is generally found in unorganized sector where either work is not constantly available or too many people are employed for the same work that does not require so many hands.

No, I do not agree with the statement that tertiary sector is not playing any significant role in the development of Indian economy. The tertiary sector has contributed vastly to the Indian economy, especially in the last two decades. In the last decade, the field of information technology has grown, and consequently, the GDP share of the tertiary sector has grown from around 40% in 1973 to more than 50% in 2003.

The service sector in India employs the following two different kinds of people. They are:
→ The people involved in the services that may directly help in the production of goods. For example, people involved in the transportation, storage, communication, finance etc.
→ The people involved in such services that may not directly help in the production of goods e.g. teachers, doctors, barbers, cobblers lawyers etc. They may be termed as ancillary workers means those who give services to the primary service providers.

Yes, workers are exploited in the unorganized sector. This would be clear from the following points:
→ There is no fixed number of working hours. The workers normally work 10 - 12 hours without paid overtime.
→ They do not get other allowances apart from the daily wages.
→ Government rules and regulations to protect the labourers are not followed there.
→ There is no job security.
→ Jobs are low paid the workers in this sector are generally illiterate, ignorant and unorganized. So they are not in a position to bargain or secure good wages.
→ Being very poor they are always heavily in debt. So, they can be easily made to accept lower wages.