Explanation: The Mahanadi is the principal river of Odisha, a state located on the eastern coast of India. It is a significant waterway that plays a crucial role in the state's agricultural and economic activities. The river originates in the highlands of the Eastern Ghats, specifically in the Dhamtari district of Chhattisgarh, and flows through Odisha before emptying into the Bay of Bengal.
The Mahanadi river system is extensive, with several tributaries that contribute to its flow. The most notable tributaries include the Seonath, Hasdeo, Jonk, and Ong rivers. The river basin covers a vast area, including parts of Chhattisgarh and Odisha, and supports a large population dependent on agriculture, fishing, and other water-related activities.
Understanding the geography of Odisha, including its major rivers, is essential for comprehending the region's environmental and economic dynamics. The Mahanadi is not only a source of water for irrigation but also a vital resource for hydroelectric power generation. The Hirakud Dam, one of the longest earthen dams in the world, is constructed on the Mahanadi and plays a significant role in flood control and power generation.
In contrast, the Godavari, Krishna, and Kaveri rivers, while important in their respective regions, do not flow through Odisha. The Godavari is the second-longest river in India, flowing through Maharashtra, Telangana, and Andhra Pradesh. The Krishna is another major river in South India, flowing through Maharashtra, Karnataka, and Andhra Pradesh. The Kaveri is a significant river in South India, flowing through Karnataka and Tamil Nadu.
Therefore, the Mahanadi is the correct answer as it is the major river that flows through Odisha, playing a crucial role in the state's geography, economy, and culture.