Question

What might happen if there are no scavengers or decomposers who eat dead plants and animals? ​

Answer 1

Decomposers eat dead materials and break them down into chemical parts. ... Nitrogen, carbon and other nutrients can then be used again by plants and animals. Without decomposers and scavengers, the world would be covered with dead plants and animals!

Answer 2

that would eventually lead to the end of the world, a balance is necessary.