A science class is conducting an investigation to see how gravity affects objects of different masses. They drop three balls from the same height. They time how long it takes the balls to hit the ground. What are the students comparing?(1 point) Responses the mass of each ball the mass of each ball the time it takes for each ball to fall the time it takes for each ball to fall the gravitational attraction of each ball the gravitational attraction of each ball the height from which each ball is dropped