Answer:
I belive that the answer is B
Explanation:
a and d are definately not it. Molusca sounds like a phylum name to me. Sounds very similar to mollusks.
I'm sure the answer is diffusion
I would say B C and D but C explains why hydroelectric power has a specifically limited future
Answer:
When the plates are at the mid ocean ridges thay are spreading apart creating new ocean floor. this is also called a divergent boundary
