Answer:
1) I don't know what option "B" is but with whats given the answer is D
2) For this one I can't see what option "D" is but with whats given the answer is C
3) I can't see what option "B" is but with whats given the answer is D
4) I can't see option "D" but out of those the answer is B
When the air is humid it means that the air is already saturated with water vapor and that air is no longer capable of holding additional water vapor. This means that the next step should be precipitation (or rain, snow, etc). Therefore, the residents should be warn of the precipitation and be advised to bring protective devices such as umbrellas, raincoats, etc.
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