Answer: The correct answer is B.
Step-by-step explanation:
A raindrop accelerates as it falls to the earth.
In a freely falling condition, only the force of gravity will act on the drop. There is a force attraction between the earth and the drop. The acceleration due to gravity will act in this case.
A raindrop accelerates as it falls to the earth because the force of gravity pulls on the drop.
Therefore, the correct option id B.