Question

Animals obtain all their carbon through
A. Plants
B. Soil
C. Air
D. Water

Answer 1

Hint: Carbon is an atom which combines with other atoms to produce several molecules that further interacts with living beings and environment.

Complete answer:
Carbon is an important component of life form on earth. Just like oxygen and water, carbon is useful too in the environment. Carbon dioxide, which is carbon plus oxygen, is a greenhouse gas which protects the earth and traps the heat.

When fossil fuels are burnt or the smoke coming from vehicles and industries, has a lot of carbon in it. The decomposition of leaves and dead decaying matter of animals produces a lot of carbon in the soil. Carbon dioxide is present in the atmosphere along with other gases.

Plants take in carbon dioxide and release oxygen, animals take in oxygen and release carbon dioxide. They depended on each other in this way.

Plants prepare their food on their own with the help of sunlight, water, chlorophyll and carbon dioxide present in the atmosphere. Animals on the other hand depend on other animals or plants.

If they eat plants as their food, they are taking in carbon. In this way, carbon is also passed as a food chain. Animals obtain carbon through plants.

Hence, the correct answer is option (A)

Note: The process in which the plants take up carbon dioxide, prepare food which later is consumed by animals and when both die, their remains makes up the carbon in soil and eventually goes into the atmosphere, is termed as carbon cycle.