Answer the following question given this paragraph: 

Acceleration is a vector, and thus has a both a magnitude and direction. Acceleration can be caused by either a change in the magnitude or the direction of the velocity. Instantaneous acceleration a is the acceleration at a specific instant in time. Deceleration is an acceleration with a direction opposite to that of the velocity.


Q: Acceleration is a vector, and thus has a both a magnitude and what else?

 Choices:

- temperature

- pressure

- wavelength

- direction

A:
direction
