(2) The drawing (for item 2) shows a mountain stream flowing over a waterfall. An aerial photograph taken 50 years ago shows that the waterfall today, compared to its previous position, has “retreated” upstream about 250 feet. What best accounts for the retreating of the waterfall? b) glacier action during winter (2) motion in the Earth's crust tidal activity (41) meandering stream action (5) erosion of the stream bed
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(2) The drawing (for item 2) shows a mountain stream flowing over a waterfall. An aerial photograph...
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