Final answer:
Photosynthesis uses carbon dioxide, water, and sunlight to produce glucose, a type of carbohydrate that stores energy, and releases oxygen as a byproduct.
Step-by-step explanation:
Photosynthesis is a process used by plants and other autotrophic organisms to convert light energy into chemical energy that can later be released to fuel the organism's activities. The correct substances that photosynthesis uses are carbon dioxide (CO2), water (H2O), and sunlight. During photosynthesis, these substances are transformed into glucose and oxygen (O2). The glucose serves as an energy-storing carbohydrate, while the oxygen is released as a byproduct.