Answer the following question given this paragraph: 

Earth goes through regular changes in its position relative to the Sun. Its orbit changes slightly. Earth also wobbles on its axis of rotation. The planet also changes its axial tilt , the angle of its axis of rotation. These changes can affect Earth’s temperature.


Q: What do you call the angle of the earth's axis of rotation?

 Choices:

- dynamic tilt

- vertical tilt

- horizontal tilt

- axial tilt

A:
axial tilt
