Final answer:
Sir Isaac Newton's units of force were named after him in honor of his contributions to the study of motion and force.
Step-by-step explanation:
Sir Isaac Newton's units of force were named after him (C) In honor of his contributions to the study of motion and force. Newton was the first scientist to precisely define the gravitational force and propose an exact mathematical form to explain the motion of heavenly bodies. His laws of motion and the law of gravity revolutionized our understanding of force and motion. Therefore, to honor his significant contributions, units of force were named after him.