potential and kinetic energy select the point where the ball has the least kinetic energy. start a b c d e

Explanation:

Step1: Recall kinetic - energy formula

Kinetic energy $K = \frac{1}{2}mv^{2}$, where $m$ is mass and $v$ is velocity. Least kinetic energy occurs when velocity $v$ is least.

Step2: Analyze the motion of the ball

At the highest points (like A), the ball is momentarily at rest before changing its direction of motion. So, its velocity is zero or near - zero at these points.

Answer:

A