Explanation: Tropical cyclones are intense low-pressure systems that form over warm tropical oceans, typically in the Bay of Bengal and the Arabian Sea. These systems are characterized by strong winds, heavy rainfall, and storm surges. They are a significant source of rainfall for coastal regions in India, particularly for the states of Tamil Nadu, Andhra Pradesh, and Odisha.
The formation of tropical cyclones is driven by several factors, including warm sea surface temperatures, moist atmospheric conditions, and a favorable wind pattern. When these conditions are met, a low-pressure system can develop into a tropical cyclone. As the cyclone moves towards the coast, it brings with it a large amount of moisture, which results in heavy rainfall.
The coasts of Tamil Nadu, Andhra Pradesh, and Odisha are particularly vulnerable to tropical cyclones due to their geographical location. These states are situated along the eastern coast of India, which is directly exposed to the Bay of Bengal. The warm waters of the Bay of Bengal provide the necessary conditions for the formation and intensification of tropical cyclones.
It is important to note that while tropical cyclones are a significant source of rainfall, they can also cause severe damage and loss of life due to their destructive winds and storm surges. Therefore, understanding the impact of tropical cyclones is crucial for disaster management and preparedness in these coastal regions.
In contrast, other options such as summer rainfall, high temperature, and low pressure do not specifically address the intense and organized nature of the rainfall caused by tropical cyclones. Summer rainfall is more associated with the southwest monsoon, which brings moisture from the Arabian Sea and the Bay of Bengal, but it is not as intense as the rainfall caused by tropical cyclones. High temperature alone does not cause rainfall, and low pressure is a broader term that does not specifically refer to the organized and intense systems like tropical cyclones.
In conclusion, tropical cyclones are the primary cause of heavy rainfall along the coasts of Tamil Nadu, Andhra Pradesh, and Odisha, making option C the correct answer.