Concept:Rainfall is encouraged by processes that lift moist air upward to cool and condense.
Explanation:Converging winds bring air together, forcing it to rise.
Ascending winds directly push air upward.
Rising air cools, and moisture condenses to form clouds and rainfall.
Warm winds hold more moisture and assist evaporation, which helps rainfall formation.
Descending winds make air sink downward.
Sinking air compresses, warms, and becomes drier.
This suppresses cloud formation and reduces the chance of rainfall.
Therefore, descending wind does not encourage rainfall.
Answer:C. descending wind