A ball is dropped on a floor and bounces back to a height somewhat less than the original height. Which of the curves depicts its motion correctly?

Without a visual representation of the curves, it's impossible to accurately answer this question. However, I can describe what the correct curve would look like.

The curve depicting the motion of a bouncing ball would start at the highest point, then drop down to the floor level (this represents the ball being dropped). The curve would then rise back up, but not as high as the original starting point (this represents the ball bouncing back up but not reaching the original height). This pattern would repeat, with each bounce reaching a lower height than the previous one, forming a series of peaks that decrease in height over time.