Final answer:
b) afterimages. The opponent-process theory is most useful for explaining afterimages. According to this theory, color is coded in opponent pairs: black-white, yellow-blue, and green-red.
Step-by-step explanation:
The opponent-process theory is most useful for explaining afterimages. According to this theory, color is coded in opponent pairs: black-white, yellow-blue, and green-red. The theory suggests that some cells in the visual system are excited by one color and inhibited by its opponent color. For example, a cell that is excited by green light would be inhibited by red light. This theory explains why we do not perceive greenish-reds or yellowish-blues, as well as the phenomenon of negative afterimages.