What are tropic levels ? Give an example of a food chain and state the different trophic levels in it.

Explanation

The various links or steps in a food chain at which the transfer of food and energy takes place are called trophic levels.
The producers form the first trophic level as they manufacture food. The primary consumers form the second trophic level, the secondary consumers form the third, and the tertiary consumers form the fourth trophic level.
Sun ⇒ Grass ⇒ Grasshopper ⇒ Shrew ⇒ Owl

Here producer is the grass, which is consumed by the grasshopper, that is, the primary consumer.The grasshopper is further consumed by the shrew, that is, the secondary consumerLastly, the shrew is eaten up by the owl, that is, the tertiary consumer.