According to Newton’s third law of motion, the correct statement is:
If a moving object hits another object, then the second object will push back.
This law states that for every action, there is an equal and opposite reaction. Therefore, when one object applies a force to another object, the second object applies an equal force back on the first object, which corresponds to "the second object will push back." The other statements are not necessarily correct in all situations (e.g., two objects colliding might not always stop or bounce off each other).