Question

Monsoon is caused by

• A. Movements of cloud
• B. Impact of Summer temperature on the sea
• C. Rise in temperature
• D. Seasonal reversal of winds

Hint:

Recall that land and sea heat unevenly through the year, and this difference flips the wind direction each season.

Answer 1

The Correct Option is D

Monsoons are a classic geography topic built on the idea of land and sea heating unevenly through the year. Let's check each option against that idea.

1. Movements of cloud: Clouds move because of the wind, so cloud movement is a visible result of the process, not the trigger behind it.
2. Impact of Summer temperature on the sea: The sea does warm in summer, but by itself this does not explain why the wind changes direction across seasons, so it is only part of the story.
3. Rise in temperature: A temperature rise happens every summer everywhere, yet not every place gets a monsoon, so temperature rise alone cannot be the defining cause.
4. Seasonal reversal of winds: Correct. Land and sea heat and cool at different rates through the year, and this difference reverses the pressure pattern and therefore the wind direction each season, which is exactly what a monsoon is.

Because the land sea temperature difference flips the wind direction from onshore in summer to offshore in winter, the seasonal reversal of winds is the actual definition of monsoon, matching option (D).

Let's summarize:

• Uneven heating of land and sea drives pressure differences across seasons.
• These pressure differences reverse the wind direction, and that reversal is the monsoon itself.

So the correct cause of the monsoon is the seasonal reversal of winds.