The factors that determine how much gravity a body in the universe possesses include:
- Mass: The greater the mass of an object, the stronger its gravitational pull.
- Distance: The gravitational force decreases with the square of the distance between the centers of two masses; as distance increases, gravity decreases.
The other options provided do not directly determine how much gravity a body possesses:
- Inertia: This refers to an object's resistance to changes in its state of motion and is not a factor in the determination of gravitational pull.
- Weight: Weight is the force exerted by gravity on an object and is dependent on both the object's mass and the gravitational pull it experiences; it does not determine the gravity of the body itself.
- Orbital Motion: While this describes the movement of bodies in a gravitational field, it does not determine the amount of gravity a body possesses.
Thus, the correct answers are mass and distance.