The correct answer is B. the different parts of the Earth rotate at different speeds.
This is known as the Coriolis effect, which arises because the Earth is a rotating sphere. Due to the rotation, different points on the Earth's surface travel at different velocities, with the equator moving faster than the poles. This difference in speed affects the path that moving air (and water) takes, causing it to curve rather than move in a straight line. In the Northern Hemisphere, this deflection is to the right, while in the Southern Hemisphere, it is to the left.