Which data would be best analyzed and communicated using a histogram?

The best thing to visualize using a diagram in this case would be the last answer - the average number of clams dredged up at different depth ranges.

The reason for this is because on the X-axis of our histogram, we can use different ranges (5-10, 10-15 ...) and the Y-axis would represent the frequency or average number of clams that are being dredged up. 

When the ball is rising up, it gains kinetic energy. when the ball reaches the very top, it will have all potential energy, until it falls back down and gains it kinetic energy. finally when you catch the ball or it falls back down, it would have gained its potential energy back.