“Animals depend on plants”. Justify the above statement.

Animals cannot produce or make their own food. The plants on the other hand can make food by fixing solar energy in the form of chemical energy by the process of photosynthesis. This chemical energy is locked in the food molecules which are taken up by the animals. This food is oxidised by the oxygen, taken in from the atmosphere, that is also released by the plants, to give energy to the animals to do work and to grow. Thus, heterotrophic organisms such as animals are dependent on plants directly or indirectly.