Choices:
[1]. heat energy.
[2]. minerals.
[3]. water.
[4]. movement.
[5]. Energy..
[6]. natural gas.
[7]. heat.
[8]. energy.

Fact 1: Agasoline lawn mower converts gasoline into motion. Fact 2: Range of motion is the natural distance and direction of movement of a joint. Given the two facts above, what does a gasoline lawn mower convert gasoline into?
Answer:
[4].