Which category does the Grand River belong to?

The Grand River is categorized as a river because it is a flowing body of water that has a defined channel and typically empties into a larger body of water, such as an ocean, sea, or in some cases, a lake. Rivers are characterized by their significant length and continuous flow, which can support various ecosystems and provide vital resources for the surrounding environment and communities.

The other options, while related to water bodies, do not accurately represent the characteristics of the Grand River. A lake refers to a large inland body of standing water, while a stream is typically a smaller, narrower body of flowing water. A tributary is a stream or river that flows into a larger river, but the Grand River itself is classified as a river, not as a tributary since it is part of a larger river system and holds its own identity as a significant watercourse.