When people alter the natural course of a river to provide irrigation, they are primarily modifiying the . A.

atmosphere
B.

hemisphere
C.

hydrosphere
D.

lithosphere

Please select the best answer from the choices provided
A
B
C
D

Option C- Hydrosphere

Explanation:

When people alter the natural course of a river to provide irrigation, they are primarily modifiying the hydrosphere.

Hope this helps you out.

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answer; silence;