Explain the work of a river at mature stage.

Explanation:

In the mature stage of a river the slope becomes gentler and the river becomes much wider as it is joined by many tributaries. The river is also carrying a load now that has been eroded from further upstream. Meanders are bends or curves which are found in the mature stage (middle course) of a river.

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d. i., ii., iii., and iv.

answerpeople organize large projects such as levee-building;