What would happen if prey was removed from the food chain?

If Prey was removed from the food chain , The animal at the top of the food chain couldn't hunt any small prey such as bunny's or coyotes , any animal couldn't hunt anything since there would be any food for them to hunt. All animals would go extinct if prey was removed from the food chain. Hope this helps. Im not entirely sure.

If prey was removed from the food chain, the amount of predators would decrease due to the lack of food. 

The answer is c. 320 g