Final answer:
A heavy red ball released from rest will fall to the ground due to gravity, and this process is known as free fall.
Therefore, option 1) is correct
Step-by-step explanation:
When a heavy red ball is released from rest and there are no other forces acting on it except for gravity, it will fall to the ground due to the acceleration caused by Earth's gravitational pull. This is an example of free fall, a concept in physics where the only force acting on an object is gravity. The velocity of the ball will increase as it falls, and it will continue to do so until it impacts the ground or is acted upon by another force.