The statement that best explains why your body continues to move forward when your foot stops after tripping is:
An unbalanced force stops your foot but does not act on the rest of your body.
This statement reflects the principle of inertia, which is described by Newton's First Law of Motion, stating that an object in motion will remain in motion unless acted upon by an unbalanced force. When your foot stops, that unbalanced force acts on your foot, but your upper body continues to move forward due to inertia.