Drawing a conclusion from an experiment means that a scientist
a) collects data from an experiment
b) makes observations about the natural world
c) decides whether or not to perform an experiment
d) rejects or confirms a hypothesis

Drawing a conclusion would be D rejects or confirms a hypothesis.

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.