Question

question 9
which of the following best describe how monsoons develop?
a warm, moist air descends from the mountains in northern india.
b cool, drier air ascends above the land mass in india.
c cool, moist air is drawn in from the ocean and is lifted up above india.

Explanation:

Monsoons develop when there is a temperature difference between land and sea. During summer, land heats up faster than water. The warm land causes the air above it to rise (low - pressure area). Cool, moist air from the ocean (high - pressure area) is then drawn in to replace the rising air. As this moist air rises over the land (in the case of India), it cools and condenses, leading to rainfall.

• Option A: Warm, moist air descending is not the mechanism of monsoon development. Monsoons are associated with rising moist air.
• Option B: Cool, drier air ascending is incorrect. The air that is drawn in during monsoon development is moist.
• Option C: This option correctly describes the process where cool, moist air is drawn in from the ocean (due to the pressure difference caused by land - sea temperature variation) and is lifted up (as it moves over the land) which is a key part of monsoon development.

Answer:

C. Cool, moist air is drawn in from the ocean and is lifted up above India.