Question

How many tropical level humans function in food chain?

Answer 1

There are four trophic level in a food chain

Answer 2

1. A vegetarian man who takes only vegetarian food occupies the second trophic level as $\sf\pink{herbivore}$.
2. A non-vegetarian who also takes chicken and mutton occupies third trophic level as $\sf\blue{primary~carnivore}$.
3. A non vegetarian who also takes fish occupies fourth trophic level as $\sf\red{secondary~carnivore}$.
4. So total number of trophic levels at which human beings can function in a food chain are two or three levels.