What happens to a rubber ducky sitting on the water surface when waves pass by?
a) It moves in a nearly circular motion, always returning to the same spot.
b) The wave fronts move it progressively forward as they pass.
c) The wave troughs move it progressively backward as they pass.
d) It moves up and down, but not forward or backward.
e) It moves side to side, but not up and down.
A
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