I need help ASAP please.

In physics the desire of an object to keep doing what it is doing is termed?

The transfer of heat through the movement of a gas or liquid a. convection b. conduction c. radiation

Agroup of students were investigating the force of gravity. they began by dropping a foam ball from a height of 3 meters into a bucket of sand. the ball hit the sand in 0.306 seconds. they dropped additional balls of approximately the same diameter, but of different masses. here is the data they collected. based on this experiment and the collected data, what would their conclusion be?