The oxygen released in photosynthesis comes from a. carbon dioxide b. glucose c. ribulose diphosphate d. water e. none of the above

### d. water

## Step1: Understanding Photosynthesis### Photosynthesis is a process used by plants and other organisms to convert light energy into chemical energy that can later be released to fuel the organisms' activities. This process involves the use of water, carbon dioxide, and light energy.## Step2: Identifying the Source of Oxygen### During photosynthesis, water molecules are split into hydrogen and oxygen. The hydrogen is used to form glucose, while the oxygen is released as a by-product. Therefore, the oxygen released in photosynthesis comes from water.