Final answer:
Chlorophyll a absorbs light with the highest energy in the violet-blue range, and leaves appear green because this pigment strongly reflects green light. Chlorophyll is the molecule that absorbs photons in photosynthesis.
Step-by-step explanation:
The color of light that chlorophylls absorb which has the highest energy is B. violet-blue. Chlorophyll, the main pigment in plants, is responsible for absorbing light during photosynthesis. Chlorophyll a, a form of chlorophyll, absorbs light primarily in the violet-blue and red wavelengths of the visible spectrum. It is the only pigment that performs the photochemistry by getting excited and transferring an electron to the electron transport chain.
Regarding why leaves on a given tree are green, the correct explanation is that the molecules in the leaves absorb all visible light but strongly reflect green light (option a). Therefore, the green color we see is the light reflected by the leaves, not absorbed.
In photosynthesis, the molecule that absorbs the energy of a photon is chlorophyll (option c). This absorbed energy is used to excite electrons necessary for the photosynthetic process.