Final answer:
The expansion card for speaker and microphone connectivity is a sound card, which is essential for audio processing on a computer. For transferring images from cameras, a memory card reader is typically used, connecting to the computer via a USB cable.
Step-by-step explanation:
The expansion card on a motherboard that provides connections for a speaker and microphone is known as a sound card. A sound card is a crucial component for computers when it comes to processing audio functions. It allows the computer to send audio information to audio devices, like speakers and headphones, and record audio from input devices, such as microphones.
When dealing with cameras and transferring images to a computer, devices such as a memory card reader are often used. The memory card reader connects to the computer using a USB cable, and it allows the computer to access the image files stored on the camera's memory card. Once connected, the card reader will enable the memory card to appear as a drive on the computer, which you can access by double-clicking the drive icon.