Answer the following question given this paragraph: 

In science, motion is defined as a change in position. An object’s position is its location. Besides the wings of the hummingbird in the opening image, you can see other examples of motion in the Figure below . In each case, the position of something is changing.


Q: In science, what is defined as a change in position?

 Choices:

- gravity

- speed

- direction

- motion

A:
motion
