Which expansion card mainly processes images and video?

Correct answer: Graphics card

The governing concept is specialized processing by expansion cards. A graphics card contains a graphics processing unit, or GPU, that handles visual calculations and prepares images and video frames for display. Thus option D is correct. A network card manages data communication, a sound card processes audio signals, and a modem converts signals for network access. Although the CPU can also process graphics tasks, the graphics card is the dedicated visual-processing expansion card.