Explanation: Understanding the distribution of precipitation across India is crucial for comprehending the climatic and geographical diversity of the country. Precipitation is a key factor in determining the agricultural, ecological, and economic activities of a region.
Western Rajasthan and Gujarat are part of the Thar Desert, which is one of the driest regions in India. The arid climate is due to the region's distance from the sea and its location in the rain shadow of the Western Ghats, which blocks the monsoon winds. As a result, these areas receive very little rainfall, making them areas of low precipitation.
Leh, situated in the high-altitude region of Jammu and Kashmir, is also an area of low precipitation. The city is located in the rain shadow of the Himalayas, which means that the mountains block the moisture-laden winds from the south, resulting in very little rainfall. The region experiences a cold desert climate with low humidity and sparse vegetation.
The Deccan plateau, which covers a large part of central and southern India, generally receives less precipitation compared to the eastern regions. However, the precipitation levels vary across the plateau. The western part of the Deccan plateau receives more rainfall due to the influence of the Arabian Sea branch of the southwest monsoon, while the eastern part receives less. Despite this variation, the Deccan plateau is still considered an area of relatively low precipitation compared to the eastern regions.
Assam, located in the northeastern part of India, is known for its high precipitation levels. The region is influenced by both the southwest and northeast monsoons, which bring heavy rainfall during the monsoon seasons. The Brahmaputra River and its tributaries also contribute to the high humidity and precipitation in the region. Assam receives an average annual rainfall of over 2000 mm, making it one of the wettest regions in India.
In conclusion, while Western Rajasthan and Gujarat, Leh, and the Deccan plateau are areas of low precipitation, Assam stands out as an area of high precipitation due to its geographical location and the influence of monsoon winds. This makes Assam the correct answer to the question.