The Thar Desert experiences a significant temperature variation due to:

Correct option is B

The correct answer is (B) Dry conditions and sparse vegetation.

Explanation:
The Thar Desert experiences significant temperature variation due to its dry conditions and sparse vegetation. This desert, located in northwest India and parts of Pakistan, has extreme diurnal temperature differences (day-to-night) and seasonal variations. The absence of vegetation, which typically helps moderate temperatures by providing shade and moisture, leads to rapid heating during the day and cooling at night. This is characteristic of desert climates, where the lack of moisture in the air and the soil results in sharp temperature fluctuations.

Information Booster:

• Temperature variation in deserts is a result of high daytime heat due to the sun’s direct radiation on the earth’s surface and rapid cooling at night when the heat escapes into the atmosphere.

• Sparse vegetation in the Thar Desert limits evapotranspiration (the process by which plants release moisture into the atmosphere), which would otherwise help moderate temperature.

• Dry conditions contribute to the lack of humidity, which otherwise would retain heat and prevent extreme temperature fluctuations.

• The Thar Desert also has very little rainfall, making it a typical arid region where temperature differences between day and night can be dramatic.