Answer:
The correct answer is because of gravity and air resistance.
Step-by-step explanation:
When we speak of free fall, we are referring to something that falls "into the void", and which has no force to oppose such a fall.
Due to the gravity and atmosphere of our planet, this situation is not possible. When an object falls close to our surface, it is very difficult to do it in free fall. Gravity is going to pull this object down, which along with air resistance, will cause the object to fall at a constant speed.