While falling, both the sheet of paper and the paper ball experience air resistance. But the surface area of the sheet is much more than that of the spherical ball. And air resistance varies directly with surface area. Hence the sheet experiences more air resistance than the ball and it falls more slowly than the paper ball.
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Solid to liquid
Liquid to solid
By adding or removing heat energy aka thermal energy
First is melts then it expands next it gets cooler Finally it gains ener. Hope this helps you out.
The answer is D. I know because I already answered the question.