Which conditions are usually the effect of a low air pressure system?

The given question is incomplete as the options are missing. The options related to this question are as follows-

(A) clear dry weather

(B) hot dry weather

(C) cloudy wet weather

(D) cold dry weather

Option (C)

Explanation:

The surface temperature often increases because of increased absorption of solar radiation, the air present at the surface gets heated up more readily, as a result of which the air becomes less dense, and eventually rises up. This gives rise to the creation of a low air pressure system. It often forms clouds comprising of increase relative humidity, and generates wind and thereby causes precipitation. It also causes heavy storms when the atmospheric conditions are too intense.

Thus, the type of weather associated with this is wet and cloudy weather.

Hence, the correct answer is option (C).