What problems could extinction of animals cause in the future?

Question

What problems could extinction of animals cause in the future?

Answer 1

our exstinction will follow

we are all together interrelated componants of eco systems

plants depend on animals ,

animals depend on plants (like polination ,and manure ,as well as planting)

and we depend on both of those

so we will also be gone when the plants and animals have gone

Answer 2

Impact of a large meteor on the earth's surface could cause extinction of animals in the future.

Answer 3

we are animals just smart ones!

but with anything if it runs out then plants and other things will not have the carrier so plants will soon die off  food will run low the sun will start  to cook more parts of the earth making it hotter cuz there are no more trees and the water will be absobed quicker leaving nothing! without water there is nothing!

well maybe a plant call it mars