Which statement best explains the cause of monsoons?

• A. Global warming
• B. Random fluctuations
• C. Unequal heating of land and sea leading to seasonal shifts in wind patterns
• D. Human activities

Answer: (C)

Monsoons are driven by the difference in heating between land and sea, which sets up seasonal shifts in wind and rainfall. In the warm months, land becomes much hotter than adjacent ocean waters, creating a strong low-pressure area that pulls in large amounts of moist air from the sea. This air rises over the land, cools, and releases a lot of rain, producing the wet season. As the land cools in the opposite season, the winds reverse and moisture transport weakens or shifts, bringing a dry season to many areas. While factors like climate warming or human activity can modulate how intense or long the monsoon is, the fundamental cause is the unequal land-sea heating that drives seasonal wind changes.