Answer:
so any pollution in the water, lakes, ponds etc. will evaporate into the air and fall down as acid rain depending on the type of pollution. Acid rain can cause erosion and harm to the environment and animals. I don't get what 3 is asking but I hope this helps enough to answer it on your own.
The notochord is most closely associated with the skeletal.
B
At the outer edges of oceanic crust
A-<span>vaccine elicits a primary response, after which the subsequent infection is fought strongly and more rapidly.</span>