Answer: Option 'B' , 'C', and 'D' are correct.
Explanation:
Acceleration means increase in speed or rate of change of velocity per unit time.
A hill would cause acceleration as it is slopy in nature.
A water movement would increase the speed of any object.
Any still object or moving object may change its position or accelerate its speed by water movement.
Wind also accelerate the speed of any object, strong wind increase of the speed of any object still or moving.
Hence, Option 'B' , 'C', and 'D' are correct.
