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AysviL [449]
2 years ago
14

This is about environmental systems ​

Biology
1 answer:
zlopas [31]2 years ago
4 0

Answer:

A. A weak or strong current

Explanation:

D. is inccorect because rivers are always freshwater

C. is incorrect because seawater is salt water

B. is incorrect because rivers have waterflow.

Mark me brainliest and have a great day!

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