Final answer:
Option B). A raindrop doesn't accelerate as it approaches the ground due to the presence of air resistance, which counteracts the gravitational force acting on it.
Step-by-step explanation:
The reason a raindrop doesn't accelerate as it approaches the ground is because of the presence of air resistance.
Option B is the correct answer. The raindrop is kept from accelerating any faster by air resistance, which opposes the gravitational force operating on it. The force of air resistance pushing upward balances the force of gravity pulling the raindrop downward as it falls. The raindrop falls at a steady speed known as the terminal velocity as a result of this net force of zero.
Therefore, the raindrop doesn't continue to accelerate because the force of air resistance counteracts the force of gravity.