Question

Songbirds often eat berries. Berry seeds are activated by the acids located in a bird's stomach. Once the bird's body eliminates the berry seeds as waste, they often fall to the ground and begin to grow. This an example of the songbird's: population community habitat niche

Answer 1

The answer is D.Habitat 

Answer 2

I don't think its a niche or community.My best guess is probably the habitat.
Hope that helps :)