Correct Answer:
C. Rain
In meteorology, a decrease in atmospheric pressure is typically indicative of an approaching low-pressure system. Low-pressure systems are characterized by rising air, which cools as it ascends. This cooling causes water vapor to condense, forming clouds and often leading to precipitation. Therefore, a decrease in atmospheric pressure can cause Rain.
- Intense conditions is too vague; while low pressure can lead to severe weather, rain is a specific outcome.
- Wind is caused by differences in pressure (pressure gradients), not solely by a decrease in pressure.
- Pleasant conditions are generally associated with high-pressure systems, where air descends and prevents cloud formation.