Question

monsoons...
a occur because of a seasonal reversal in wind direction.
b affect more than 60% of the worlds population.
c occur because of the principle that water heats up quicker than land.
d develop between august and september yearly.

Explanation:

• Option A: Monsoons are characterized by a seasonal reversal in wind direction. This is a fundamental characteristic of monsoons.
• Option B: Monsoons do affect a large portion of the world's population, but the key defining feature is the wind - direction reversal.
• Option C: Land heats up quicker than water. During the day, land heats up faster than water, creating a low - pressure area over land and high - pressure over water, causing winds to blow from sea to land (sea breeze). At night, land cools faster than water, creating a high - pressure area over land and low - pressure over water, causing winds to blow from land to sea (land breeze). But for monsoons, it is the seasonal (not daily) heating and cooling difference. Also, the statement in option C is factually wrong as land heats up quicker than water.
• Option D: Monsoon seasons vary by region. For example, the Indian monsoon typically has a wet season from June - September, but this is not a universal time frame for all monsoon regions.

Answer:

A. occur because of a seasonal reversal in wind direction, B. affect more than 60% of the worlds population