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Biology, 29.01.2021 21:50 mazz1041

A hiker finds a smooth, rounded pebble along the shore of a stream that is flowing down from a mountain. Which of these most likely caused the pebble to have this appearance?

A, b,c or d !?
PLS I NEED HELP


A hiker finds a smooth, rounded pebble along the shore of a stream that is flowing down from a moun

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