Question

speed, velocity, and acceleration
a ferris wheel moving at a constant speed is accelerating because...
its changing direction
because circles are crazy

Explanation:

Acceleration is a vector quantity that depends on both speed and direction. Even if the speed is constant, a change in direction (as in circular motion of a Ferris wheel) means there is an acceleration. The option "because circles are crazy" is not a scientific explanation.

Answer:

its changing direction