Explanation: Rajasthan, located in the northwestern part of India, is known for its arid and semi-arid climate, which is characterized by very little rainfall. The state's climate is heavily influenced by the presence of the Thar Desert, which covers a significant portion of the state. The Thar Desert is one of the largest deserts in the world and is known for its extremely low rainfall, with some areas receiving less than 100 mm of rain annually.
The rainfall in Rajasthan is highly variable and is primarily influenced by the monsoon season, which typically occurs between June and September. However, even during the monsoon, the rainfall is often erratic and insufficient to support agriculture and other water-dependent activities. The average annual rainfall in Rajasthan is around 600 mm, but this figure can vary greatly from year to year and from one region to another within the state.
The low rainfall in Rajasthan is due to several factors. The state's location in the rain shadow of the Aravalli Range, which runs through the state, blocks the monsoon winds from the Arabian Sea, leading to a significant reduction in rainfall. Additionally, the state's distance from the Bay of Bengal, which is another source of monsoon moisture, further reduces the amount of rainfall received.
In contrast, other states like Delhi, Gujarat, and Haryana receive more rainfall due to their geographical locations and climatic influences. Delhi, being closer to the Himalayas, receives more rainfall due to the influence of the monsoon and the orographic effect of the mountains. Gujarat, although semi-arid, receives more rainfall due to its proximity to the Arabian Sea and the influence of the monsoon. Haryana, located in the northern plains, also receives more rainfall due to the monsoon and its proximity to the Himalayas.
Therefore, among the given options, Rajasthan is the state that receives the least rainfall, making it the correct answer. Understanding the climatic and geographical factors that influence rainfall patterns is crucial for comprehending the unique characteristics of Rajasthan's climate and its impact on the state's environment and economy.