Physics, 30.04.2021 01:10 goat561

Robbie found a rock in a stream. The rock was smooth and round. What MOST LIKELY caused this to happen? A. the summer sun
B. Earth's magnetic poles
C. weathering by water
D. cold winters

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Robbie found a rock in a stream. The rock was smooth and round. What MOST LIKELY caused this to happ...