All physical objects are attracted to one another by which of the following?

Inertia refers to an object's resistance to changes in its state of motion or rest. While it describes how objects behave when forces are applied, it does not account for the attractive force between objects. Inertia is not a force but rather a property of matter that influences how objects respond to applied forces, such as gravity.

Acceleration is the rate of change of velocity of an object, resulting from the application of a force. It does not describe the attraction between objects but rather the effect that forces, including gravity, have on their motion. Therefore, acceleration alone cannot explain the attraction between physical objects.

Magnetic force specifically refers to the attraction or repulsion between magnetic materials or charged particles in motion. Although it is a fundamental force, it only applies to certain materials under specific conditions and is not a universal force like gravity that affects all physical objects.