I'm not sure but I think the answer is A. Plants. Then again I'm not 100% sure that this is correct
Answer:
<h2>The source rock is the rock that contains the kerogen that the oil and gas forms from. The reservoir rock is the porous, permeable Rock layer or layers that hold the oil and gas. This migration occurs because oil and gas are less than than water.</h2>
Kidney. The kidney plays the role of keeping blood pressure in check by altering the blood volume.
Predator is an animal hunt.The prey is the animal that is being eaten by other animals. if there a lots of predators and few preys.the predators will compete for food