The three laws of motion were first compiled by Isaac Newton in his Philosophiæ Naturalis Principia Mathematica (Mathematical Principles of Natural Philosophy), first published in 1687. Newton used them to explain and investigate the motion of many physical objects and systems
I think the best statement that explains why the author included both of these scenes in the story is that its purpose is to develop the relationship between the old man and the boy. The answer is letter D.
