An eagle is a carnivore. it most likely gets the energy it needs to reproduce from
a) oxygen.
eliminate
b) plants.
c) the sun.
d) rodents.

It's obviously not the sun, because only plants get energy from the sun. You can also eliminate plants, because it says the eagle is carnivorous. (Carnivorous means that an organism eats only meat) And oxygen is only a small part of the energy making process, so the awnser is rodents. This awnser makes sense because most carniveorous birds eat small animals like mice, rats, and bunnies. 

Active site is where they touch.