Here's why:
* Photosynthesis: Leaves, like all green plants, perform photosynthesis. This process uses sunlight, water, and carbon dioxide to produce glucose (sugar) and oxygen.
* Oxygen Production: Oxygen is a byproduct of photosynthesis and is released by the leaves into the surrounding environment.
* Oxygen Diffusion: When a leaf is submerged in water, the oxygen it produces diffuses into the water.
Therefore, a submerged leaf actually adds oxygen to the water, not removes it.
It's important to note that while submerged leaves release oxygen, they also absorb carbon dioxide from the water. This is another important part of the photosynthesis process.
