I would say B C and D but C explains why hydroelectric power has a specifically limited future
The Great Plains have a continental climate. Much of the plains experience cold winters and warm summers, with low precipitation and humidity, much wind, and sudden changes in temperature. More rainfall occurs in summer than in winter, except in some of the northwestern parts of the Great Plains.
Hopes this helps!
Answer: The Answer is C
Explanation: The deer is eating getting carbon by eating the grass (the producer)