Answer:
D. adaptations
Explanation:
( it might be wrong pls dont report me just let me kno y its wrong )
Answer:the valves prevents the backward flow of blood
Explanation:
Answer:
A and B should be the answer if you can pick two, but B is the answer.
Out of all the options, only "Volcanic Eruption" is the rapid change
In short, Your Answer would be Option D
Hope this helps!
