Which of the following statements best describes the weather conditions at positions a and b shown below?
a. it is raining at position a and clear at position b.
b. it is cloudy at position a and clear at position b.
c. it is cooler at position a than at position b.
d. it is warmer at position a than at position b.

Option (D)

Explanation:

The warm front refers to the region, where the cold air mass is readily being replaced by the warm air mass. This warm front is usually identified by the semi-circles in a weather map.

In the given image, a warm front is being shown. Here, the region comprising letter A is the warm zone and the region above the front comprising the letter B indicates a cold zone. The position A forms a low-pressure zone, so it is comparatively warmer than the position B.

Thus, the correct answer is option (D).

lol i would say c -porductivity