GEOLOGY

Detailed explanation-1: -A tributary is a freshwater stream that feeds into a larger stream or river. The larger, or parent, river is called the mainstem. The point where a tributary meets the mainstem is called the confluence. Tributaries, also called affluents, do not flow directly into the ocean.

Detailed explanation-2: -A confluence is a junction formed when two rivers merge. A mandal is another name for sub-district in India. A tributary is a river or stream that flows into a larger river.

Detailed explanation-3: -A tributary is a river or stream that enters a larger body of water, especially a lake or river. The receiving water into which a tributary feeds is called the “mainstem, ” and the point where they come together is referred to as the “confluence.”

Detailed explanation-4: -The correct option is B river basin. The area drained by a river along with all its tributaries is called a catchment area or river basin.

Detailed explanation-5: -The rivers of India can be classified into four groups viz., Himalayan rivers, Deccan rivers, Coastal rivers, and Rivers of the inland drainage basin. The Himalayan Rivers are formed by melting snow and glaciers and therefore, continuously flow throughout the year.