A scientist fills a glass container with water and places an aquatic plant inside the container, then closes the lid and places the container in direct sunlight. The scientists observes small bubbles on the surface of the plant's leaves on days 1 and 2, but no bubbles on day 3. The scientist concludes that the bubbles were caused by photosynthesis. Which substance should be added to the water in order for the bubbles to reappear. (1 point)

Responses

carbon dioxide
carbon dioxide

oxygen
oxygen

hydrogen gas
hydrogen gas

glucose