What does the changeBall function aim to do?

The changeBall function is designed to enhance the visual dynamics of a ball within a program by introducing randomness both in its position and color. When this function executes, it not only relocates the ball to a new random location on the screen, thus making the animation more engaging and unpredictable, but it also changes the ball's color, adding a vibrant visual effect.

This randomness invites users to notice and interact with the ball in unexpected ways, creating a lively experience rather than a static one. The focus on both movement and color change plays a crucial role in animating the ball effectively within the game or animation context.

Other choices do not align with this function's purpose. For instance, simply redrawing a circle at a fixed position (the first option) would not provide the same level of interaction and visual interest. Creating a new ball with a random size (the third option) would change the nature of the object rather than just its appearance and position. Lastly, resetting the ball's position to the starting point (the fourth option) would not involve any randomness and would result in a repetitive and less dynamic experience.