It's inertia. Inertia is the force that resists change in motion, like the planets and gravity. Inertia is effected by gravity
D. Inertia Acceleration is the rate at which an object changes its velocity, displacement is the overall change in an object'a position, an momentum is mass in motion.
The correct answer is inertia, which is the tendency of an object to resist changes in its motion. It is an important concept in physics, relating to an object's mass and its state of motion. Inertia explains why an object at rest stays at rest and why an object in motion continues in motion unless acted upon by a force.
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