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 stream or river that flows into a larger river is called a tributary.

Detailed explanation-3: -Small rivers can be referred to using names such as creek, brook and rivulet.

Detailed explanation-4: -A river is a large body of fresh, flowing water.

Detailed explanation-5: -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.”