Final answer:
The raft will move in the opposite direction that the person is walking due to Newton's third law of motion.
Step-by-step explanation:
The raft will move in the opposite direction that the person is walking. This is due to Newton's third law of motion, which states that for every action, there is an equal and opposite reaction.
Since the person is applying a force on the raft by walking, the raft will push back with an equal force in the opposite direction. This force will cause the raft to move in the opposite direction of the person's motion.
Therefore, the raft will move to the left as the person walks to the right.