Question

The water flowing over stones in a stream or river
makes them round and smooth mainly due to
(1) Static friction
(2) Rolling friction
(3)-Fluid friction
(4) Sliding friction​

Answer 1

Answer:

4

Explanation:

#sliding friction #

it is the right

Answer 2

Answer:

The water flowing over stones in a stream or river makes them round and smooth mainly due to fluid friction.

Abrasion rocks collide causing the rocks to chip and become smooth the rocks.

motion of the water---The motion of the water pushes the rocks and causes the rocks to collide with the rocks and the stream beds.

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