Which BEST describes the difference between speed and velocity?

The only difference between the speed and the velocity is that the velocity tell us about magnitude and direction but speed tell us about magnitude only. Hence, the correct option is, (D) Velocity includes rate of change and direction.

Speed refers to the distance covered by an object in unit time. Velocity refers to the displacement of the object in unit time. speed is the Scalar quantity and velocity is the Vector quantity. in speed Rate of Change of distance but in velocity Change of displacement