If some imbalance in nature occurs for a short duration, nature can revert to it's balanced state.

Bacteria and fungi

Green plants

An uncontrolled fire occuring in forests.

The sequence of who eats whom in the environment.

I am a source of energy to all the living organisms on Earth. Life is not possible without me. Who am I?

I am at the level after the producers in the food chain. I eat plants to get energy. Who am I ?

I clean the environment by eating away dead remains of plants and animals. I also return the minerals back to Earth. Who am I ?

I cannot hunt animals but eat the leftovers of other carnivores. Who am I ?

I use sunlight, water and carbon dioxide to prepare food for myself. Who am I ?