The gas released during photosynthesis is oxygen (O₂). This process occurs in plants, algae, and some bacteria, where they convert sunlight, carbon dioxide (CO₂), and water (H₂O) into glucose and oxygen. Photosynthesis primarily takes place in the chloroplasts of plant cells, utilizing chlorophyll to capture sunlight. Through a series of chemical reactions, the energy from sunlight powers the synthesis of organic compounds. The oxygen produced is essential for the survival of most life forms on Earth, as it is used in cellular respiration by animals and humans. This fundamental process underscores the interconnectedness of life on our planet.