Final answer:
Plants can carry out photosynthesis using red light alone, although the process may not be as efficient as when they receive a full spectrum of light.
Step-by-step explanation:
The correct answer is a) Yes. Plants can carry out photosynthesis using red light alone, although the process may not be as efficient as when they receive a full spectrum of light. Red light has a longer wavelength compared to other colors of light, and it is absorbed by the chlorophyll pigments in plants. This initiates the photosynthetic process, allowing plants to produce glucose and oxygen.