Question

what happens to water as it moves toward the poles?
choose one option
a it becomes saltier.
b it becomes warmer.
c it becomes less dense.
d it becomes more suitable for drinking.

Explanation:

As water moves toward the poles, it gets colder. When water cools, salt can become more concentrated (due to processes like freezing, where ice forms and leaves salt behind), making it saltier. Option B is wrong because poles are cold, so water doesn't warm. Option C: colder water is more dense (water is most dense around 4°C), so it doesn't become less dense. Option D: saltier water is less suitable for drinking, so this is wrong. So the correct option is A.

Answer:

A. It becomes saltier.