Hi there!
![\large\boxed{\text{A) Kinetic Energy}}](https://img.qammunity.org/2021/formulas/biology/high-school/jq4vndcmth5k43tmv9i9s8foml65v5kjzk.png)
When an object begins at rest but a force acts upon it to cause it to be in motion, energy transfer occurs.
In this instance, the ball was initially at rest, so it had potential energy. Once the ball begins is in motion, however, the potential energy is converted into Kinetic Energy.