Final answer:
The visual effect of movement seen when changing from one slide to another in a presentation is called a transition.
Step-by-step explanation:
The visual effect of movement that appears when one slide changes to the next slide is known as a transition. Transitions can be used to add a visual flair to a presentation and signify that one slide has ended and another is beginning. They include various effects like fades, wipes, cuts, and even more complex animations that can make slides appear as though they are moving. Out of the given options, Animation refers to the movement within a single slide, Morph is a specialized type of transition in newer versions of PowerPoint that moves objects between slides smoothly, and a Slide show is simply a sequence of slides being presented.