Question

What will happen if we will kill all the organism in one trophic levels

Answer 1

then decomposition process stop or dead bodies are not destroy and every place where full of dead bodies

Answer 2

when we kill all the organisms in one trophic level, the other organisms living in other trophic levels will also die after sometime as all the trophic levels are interconnected to each other in the form of food web nd there will be a competion between the organisms for food.