Explanation: In the context of Karnataka's geography, rivers are classified based on their direction of flow. The primary directions of flow are east and west, with some rivers flowing towards the Bay of Bengal (east) and others towards the Arabian Sea (west).
The Tunga River, which is the correct answer, is a significant river in Karnataka that flows eastward. It originates in the Western Ghats and joins the Bhadra River to form the Cauvery River, which is one of the major rivers in southern India. The Tunga River is known for its clear waters and is a vital source of water for irrigation and domestic use in the region.
The Gurupura River, on the other hand, is a west flowing river. It originates in the Western Ghats and flows westward into the Arabian Sea. This makes it unsuitable for the criteria of an east flowing river.
Similarly, the Aghanashini River is another west flowing river in Karnataka. It also originates in the Western Ghats and flows westward into the Arabian Sea. This river is known for its scenic beauty and is a popular destination for adventure sports like rafting.
The Varahi River is a small river that flows into the Arabian Sea, making it a west flowing river. Its small size and westward flow make it an incorrect choice for the question.
Understanding the direction of flow of rivers in Karnataka is important for various reasons, including water resource management, ecological studies, and geographical knowledge. The east flowing rivers like the Tunga play a crucial role in the agricultural and economic activities of the region, as they provide water for irrigation and other domestic uses.
In summary, the Tunga River is the correct answer because it is an east flowing river in Karnataka, joining the Bhadra River to form the Cauvery River, which is a significant river system in southern India.