Question

if all the deer are
killed from the food chain what effect would it have on an ecosystem​

Answer 1

Answer:

It will disrupt the ecosystem.

Explanation:

Simple.

You kill the deers.

Number of lions and tigers will decrease since they won't be able to get food, which is normally deer. (Organisms in the food chain above deers).

Number of plants/grass will increase (below deer). (which might have a side effect. Might!)

Hope my answer helped you understand, deer.