When you move your head from side to side or walk around, the apparent movement of stationary objects relative to one another is .

Motion parallax cue.

Explanation:

Motion parallax cue can be defined as a monocular depth cue that arises from objects moving at constant velocity (speed) across the retina or frame appearing to move faster when they are closer to the observer than they appear if they were at a farther distance.

Simply stated, motion parallax refers to a change in position due to the movement of the observer.

Hence, when you move your head from side to side or walk around, the apparent movement of stationary objects relative to one another is known as motion parallax cue.

Therefore, monocular depth cues such as motion parallax gives a valid explanation as to why stationary objects such as trees appear to move when you move your head from side to side.

For example, an observer (passenger) in a moving car looking outside the window would see stationary objects moving due to motion parallax cue.

note: the given question is incomplete.

complete question is given below.

which is an example of kinetic energy?

a. the energy stored in ethanol  

b. a hockey puck sliding across the ice  

c. a compressed spring  

d. a ball sitting at the top of a ramp

solution: the kinetic energy is the energy posses by the virtue of the motion of the object.

in the given options, a, c and d are the example of potential energy because it is the energy posses by the virtue of the rest of the object. but option b has the kinetic energy as the object is in motion.

hence, a hockey puck sliding across the ice   is the apex example of kinetic energy.

so, the option (b) a hockey puck sliding across the ice   is the correct option.