Question

Match the columns.

Column I	Column II
I. Circulation of water	A. Dust water and gases above the earth
II. Circulation of nitrogen	B. Food chain
III. Circulation of food material	C. Hyrdrological cycle
IV. Troposphere	D. Nitrogen cycle

• A. I-A, II-B, III-C, IV-D
• B. I-A, II-D, III-C, IV-B
• C. I-C, II-D, III-B, IV-A
• D. I-C, II-A, III-D, IV-B

Answer 1

Answer: (C)

I-C, II-D, III-B, IV-A

Hydrological cycle is also known as water cycle. It is the continuous circulation of water from the earth's surface to the atmosphere leading to the formation of clouds and ultimately rains.

Nitrogen cycle is the process of conversion of atmospheric nitrogen into ammonia and nitrates by nature or by nitrogen-fixing organisms so that it can be used by plants for their growth. After the death of plants and animals, the nitrogen in their bodies is returned back to the atmosphere to be again ready for re-circulation.

Food chain is a sequence of organisms representing who eats whom in an ecosystem. In a food chain, energy in the form of food is transferred from one trophic level to another.

The lowermost layer of earth which shows the existence of weather and ranges from 0 to 16 km from the surface of earth is known as troposphere.

Thus, the correct answer is option C.