Solar radiation plays the most important role in the Water cycle (Hydrological Cycle) as Sun plays an important role in evaporation from earth surface, Water bodies and Biological organisms. Even the melting of ice from icecaps/glaciers is due to heat of sunrays.

Correct Option: C

Solar radiation plays the most important role in the Water cycle (Hydrological Cycle) as Sun plays an important role in evaporation from earth surface, Water bodies and Biological organisms. Even the melting of ice from icecaps/glaciers is due to heat of sunrays.

Hydroelectricity is the most sustainable method of generating electricity. It is one of the renewable source of energy in which the kinetic energy of flowing streams can be used to run the turbines to generate electricity through dams or other natural waterfalls. Presently all the given statements are responsible, but hydro electricity projects would be economical and sustainable in India.

Correct Option: C

Hydroelectricity is the most sustainable method of generating electricity. It is one of the renewable source of energy in which the kinetic energy of flowing streams can be used to run the turbines to generate electricity through dams or other natural waterfalls. Presently all the given statements are responsible, but hydro electricity projects would be economical and sustainable in India.

Sustainable development is a case of intergenerational sensibility in respect of use of natural resources. It is the development of present generation without depleting the resource share of future generation. It includes the Concept of Needs and Idea of Limitations.

Correct Option: A

Sustainable development is a case of intergenerational sensibility in respect of use of natural resources. It is the development of present generation without depleting the resource share of future generation. It includes the Concept of Needs and Idea of Limitations.

Nitrogen is not greenhouse gas and is present as largest proportion of atmosphere (about 78%). As this not present in upper layer of troposphere, it does not act as greenhouse gas.

Correct Option: D

Nitrogen is not greenhouse gas and is present as largest proportion of atmosphere (about 78%). As this not present in upper layer of troposphere, it does not act as greenhouse gas.

As wetland is a transition zone between the riverine drainage and oceanic reservoir, it plays a big role in maintaining high biodiversity and in retaining sediments from the rivers before entering into large water bodies.

Correct Option: D

As wetland is a transition zone between the riverine drainage and oceanic reservoir, it plays a big role in maintaining high biodiversity and in retaining sediments from the rivers before entering into large water bodies.