Final answer:
The nurse is utilizing PowerPoint lecture slides designed with a focus on images displayed for 20 seconds each, likely for an engaging educational presentation.
Step-by-step explanation:
The nurse is creating a presentation that utilizes slides, where each slide containing an image is set to be visible for 20 seconds. This approach to slide design falls under utilizing PowerPoint lecture slides or other presentation software, which are often employed in educational settings. These slides can provide images and descriptions, serve as a starting place for building lectures, or be used to outline learning objectives, provide feature focuses, and pose discussion questions. In this case, the nurse appears to be using the slides for a specific presentation purpose, likely to keep the audience engaged with visual aids without overwhelming them with text or rapid transitions between slides.