Answer:
Oxygen (O2) concerntration
Temperature
pH
I would have to say Proteins, lipids, and carbohydrates. Carbohydrates being the first energy source, lipids second and lasting the longest, and proteins the third and final source. although you did not give the full question, so i do not know if i can be completely sure.
Answer:
d . different population of the same species physically separated from each other forming new species.
They get runoff into water sources which can be injested by fish which can be injested by birds or any animal who eats the fish or drinks the water including us!
I think it's electric force. Not 100% sure but I hope it's right.
