Final answer:
The law of universal gravitation states that gravitational force is related to mass and distance, being directly proportional to the product of the two masses and inversely proportional to the square of the distance between them.
Step-by-step explanation:
The law of universal gravitation states that the gravitational force between two objects is related to mass and distance. Specifically, this law, formulated by Sir Isaac Newton, posits that the gravitational force is directly proportional to the product of the masses of the two objects in question and inversely proportional to the square of the distance between their centers. Therefore, the correct answer to the question is that gravitational force is b. related to mass and distance.