C. the answer is c. i just took this test on keystone (i think this is keystone question. right?0
Because it helps the environment strive and keep its self alive my controlling populations and bringing in new ones
This is a difficult question to answer with the given information...could you add more
Plants use the sun to produce food then animals eat the plants for food
I believe the answer is most likely
C): 4
I hope this is correct and helps
