A food chain is a linear representation of the energy going through organisms while a food web shows multiple connections between the organisms.
Answer:
Trichromatic vision.
Explanation:
Trichromatic theory may be defined as the theory that posses of three independent channels that are used to convey the color information. They are derived from the three different cone cells.
The television also produce three primary colors by the use of trichromatic theory. The receptor or these colors in human are greater than three as different colors have different intensity of light. The opsin protein plays an important role in the trichromatic vision.
Thus, the answer is trichromatic vision.