Answer:
F2 and F3 forms action-reaction pair
Explanation:
In accordance to Newton's third law of motion, action-reaction pairs are formed.
The law is based on the fact that for every action there exist a force that acts opposite and equal to the action force resulting in action reaction pair as they act on different object leading to the motion.
Here, the hot air balloon is in vertically upward motion at constant speed, the speed remains same resulting in no acceleration and also the weight of the student exerts a force opposed by the force exerted by the balloon
