Hello! Polar climate is in North & South Poles, where the weather there is extremely cold. Just by looking at the answer choices alone, A and B are both eliminated, because it is not hot, warm, or humid. Plus, the weather described in those answer choices does not fit at all. D is out as well, because the weather does not vary in the poles. It is very cold year-round. The only answer choice that even makes sense in this problem is C. Therefore, the answer is C.
B. They can often include and affect other factors which can be difficult to find a solution that doesn’t leave behind a negative affect.
A)by providing water for irrigation and restoring trees to areas where forests once existed
To measure wind or gas current
