Final answer:
The color of wine is primarily derived from the skin of the grapes, while the seeds may affect bitterness and have less influence on color.
Step-by-step explanation:
The color of wine primarily comes from the skin of the grapes. When grapes are fermented to make wine, the pigments in the skins give red wines their color. White wines are often made by fermenting only the grape juice, without the skins, which is why they have a much lighter color. The seeds can also contribute to the bitterness of the wine but have less effect on the color. To answer the student's question, the color of wine comes from 'a. The skin'.