Answer:
The oxygen is released into the air.
Step-by-step explanation:
Photosynthesis takes place in the chloroplasts, which are found in the cells in the leaves and stems of plants. The oxygen produced by photosynthesis diffuses into the intercellular space and out of the underside of the leaves through the stomata. This oxygen is then released into the air. Phytoplankton and cyanobacteria also undergo photosynthesis, so sometimes the oxygen is released into water as well.