Question

Discuss what would happen to the number of lions if all the deer suddenly disappeared from a forest

Answer 1

if all the deer's disappeared from the forest then the lion population would also get disappeared from the forest.
this is because the lions depend on deer's for their food. if deer's disappeared from the forest then there will be no food for lions. then the lions may be die with hunger. so there is a chance of the exttion of lion population. so the food chain and food web should not get disturbed. if any particular species got extinct then the whole food chain would get affected.

hope this helps