Question

what does the river do over the pebbles?​

Answer 1

Answer:

The river smoothens them. Explanation: When the river water passes over the pebbles,it creates frictional force and wears out the pebbles.

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Answer 2

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The river smoothens them. Explanation: When the river water passes over the pebbles,it creates frictional force and wears out the pebbles.