The strength of gravitational force is affected by the mass of objects and which of the following?

The distance between two objects

Explanation:

Depending on how far away or how close two objects are will affect the gravity.

Gravitational force strength depends only on two factors, mass of objects and distance between the objects.

Explanation:

The distance between two objects experiencing the gravitational force are in inverse relationship in proportionality.

That is, when distance between two increases, "strength of gravitational force decreases", and vice versa. If the one of the mass is doubled, force of gravity also doubles and if it increases, force of gravity also increases.