LIFE SCIENCE

Detailed explanation-1: -Animals obtain carbon through plants. 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.

Detailed explanation-2: -Through the process of photosynthesis, carbon dioxide is pulled from the air to produce food made from carbon for plant growth. Carbon moves from plants to animals. Through food chains, the carbon that is in plants moves to the animals that eat them. Animals that eat other animals get the carbon from their food too.

Detailed explanation-3: -Plants take up nitrogen compounds through their roots. Animals obtain these compounds when they eat the plants. When plants and animals die or when animals excrete wastes, the nitrogen compounds in the organic matter re-enter the soil where they are broken down by microorganisms, known as decomposers.