Answer:
Gravity and air pressure.
Step-by-step explanation:
Gravity and air pressure are the forces that exists on falling egg and the ground. The gravity of earth attracts the egg towards its center. According to Newton's third law of motion, the fall of egg on the ground is considered as action whereas the ground also apply equal but opposite force due to which eggs are broken. if there is a ball instead of egg, it bounces back due to the reaction of ground. Air pressure also affected the motion of the falling body.