Answer:
The correct answer is Oxygen.
Step-by-step explanation:
I have it here in my notes (simplified) that "Carbon dioxide comes into the plant, changes into Oxygen, and is released into the air where plants and animals can use it to sustain life on earth."
(Also from my notes) Cellular respiration combines glucose and oxygen to result in carbon dioxide, water, and Energy.
(I love my notes, thank you very much) "Photosynthesis is the opposite as cellular respiration." In Carbon dioxide combines with water, and light energy to make glucose and oxygen.
Thank you for taking the time to read this! :3