Question

How many trophic levels are there in the following food web?

Answer 1

Three trophi lavel are in food web primery secondary tersery

Answer 2

here is your answer mate.....

Although your question is not complete here is some prediction...

in Grassland ecosystem there are 5 trophic levels.

In marine ecosystem there are 4 trophic levels.

and in Forest ecosystem there are only three trophic levels.

hope it helps you....