Creates the illusion of roundness or three dimensionality through the use of light and shadow on a two-dimensional surface.

the independent variable, or the one that is intentionally manipulated is the speed.

answer would be letter choice (a),   a ball resting on a shelf. would be another example of potential energy   >   stored energy > not moving.

a ball spinning on a finger   >   kinetic energy > moving energy

a ball rolling on the ground   >   kinetic energy   > moving energy

a   ball flying through the air   > kinetic energy   >   moving energy

hope that                                         : )