Question

"harming" the plants and animals of an ecosystem can be disastrous. explain

Answer 1

ecosystem means the biosphere
biosphere includes the environment
as we harm or kill the plant or animal respectivly then it can cause change in the ecosystem .
therefore....

Answer 2

An ecosystem is a community of plants, animals and other living organisms that share the benefits of a particular space or environment such as air, food, water and soil. It’s no different from our human community where every citizen of a city relies on its own resources and interacts with its environment.