What would increase the gravitational force between two objects?

Increasing the gravitational force between two objects is directly related to their masses and the distance between them. Specifically, gravitational force is defined by Newton's Law of Universal Gravitation, which states that the gravitational force between two objects is proportional to the product of their masses and inversely proportional to the square of the distance between them. Therefore, when the mass of either object is increased, it leads to a greater gravitational force between them.

By increasing the mass of an object, you increase the overall gravitational attraction it exerts, thereby enhancing the gravitational pull felt by the other object. This fundamental relationship underscores the significance of mass in gravitational interactions, making it a crucial factor in determining the strength of the gravitational force.

The other choices either decrease the gravitational force or have no effect on it. For example, increasing the distance results in a weaker gravitational force, as does decreasing the mass of the objects. The gravitational constant is a fixed value in the equation and cannot be changed to affect the gravitational force in a practical scenario, thereby having no relevance in this context.