What will happens if we kill all the organisms in one trophic level?

Explanation

If we kill all the organisms of one trophic level it will create an imbalance in the ecosystem. As an Example, in a food chain Grass --- Deer --- Lion, ifwe remove all lions then population of deer will increase which wiHcause over-grazing. This will lead to deforestation. It may even lead to soil erosion causing further conversion of fertile land into barren desert