The correct answer to the question is:
B. tributary
Explanation:
1. A tributary is a stream or river that flows into a larger main river, lake, or another body of water.
2. Tributaries contribute water and sediment to the main body of water they flow into.
3. The point where a tributary meets a larger body of water is known as the confluence.
4. Tributaries play a significant role in the overall hydrological system and are essential for the health and maintenance of river ecosystems.