Final answer:
Devices such as overhead projectors, laptops, computers, and external monitors have specific functional requirements they need to meet in order to function properly, such as needing slides, a CD-ROM drive, or connection ports.
Step-by-step explanation:
The functional requirements of each device mentioned in your question are pivotal in ensuring the correct setup and usage. For an overhead projector, it requires slides to project images (d), since its primary function is to enlarge images from a transparency sheet onto a screen for viewing by an audience. A laptop, on the other hand, may require a CD-ROM drive to run presentation CDs (a), depending on its specifications and the needs of the user. When discussing a computer, we often see an integrated or external monitor to project high-resolution images (c), which is essential for visual clarity. Lastly, an external monitor usually requires a port to connect to the laptop (b) or another device to function as a display screen.
Here's the final match:
1. an overhead projector - d. requires slides to project images
2. a laptop - a. requires a CD-ROM drive to run presentation CDs
3. a computer - c. requires an external monitor to project high-resolution images
4. an external monitor - b. requires a port to connect to the laptop