Name three parts of a river system.

The upper course, middle course, and lower course are the three parts of the river.

Explanation:

The source of a river can be found on the upper course. The land is usually high and mountainous, and the river has a steep gradient with fast-flowing water. There is a lot of weathering and erosion. The rivers are divided into three parts: the upper part, the central part, and the lower part. The upper part is closer to the source of a river. The earth is generally high and mountainous, and the river has a steep gradient with water flowing rapidly. There is a lot of vertical erosion and inflexible weather.

upper course, middle course, lower course

Explanation:

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