Final answer:
During photosynthesis, plants convert solar energy into chemical energy, which is stored as glucose and later used by the plant and other organisms.
Step-by-step explanation:
The correct energy conversion that takes place in plants during photosynthesis is solar to chemical energy. Through the photosynthesis process, plants absorb light energy from the sun and transform it into chemical energy in the form of glucose. This energy is then stored within the chemical bonds of glucose. Photosynthetic organisms, such as plants, serve as the foundation for most life on Earth as they produce the chemical energy that is necessary for themselves and other organisms.