The correct answer is option 1: "Of the location of the Himalayas in its North."

The climate of a region is influenced by various factors, and in the case of India, the presence of the Himalayas in the north plays a significant role in determining its climate. The Himalayas act as a barrier, preventing the cold winds from Central Asia from entering India, thus protecting it from extreme cold temperatures. This leads to a relatively warmer climate throughout most of India.

Option 2, "Major part of India lies within the tropics," is not the main reason for India`s tropical climate. While it is true that a significant portion of India is located within the tropical region, this alone does not explain India`s climate patterns.

Option 3, "Of the over-powering influence of the Indian Ocean," is incorrect. While the Indian Ocean does have an influence on India`s climate, it is not the main reason for its tropical climate. The Indian Ocean influences the monsoon seasons in India, but it does not determine the overall tropical nature of the climate.

Option 4, "Of the seasonal influence of jet streams," is also incorrect. Jet streams are high-altitude winds that can influence weather patterns, but they are not the primary reason for India`s tropical