Oxygen comes out of the stomata during photosynthesis through the process known as 

Enesiabdulshakoor

1 year ago

The correct answer is:
**A. diffusion**

### Explanation:

During **photosynthesis**, plants produce **oxygen** as a by-product. This oxygen moves **out of the leaf through the stomata** by the process of **diffusion**, which is:

- The **movement of molecules** (like oxygen) from a region of **higher concentration** (inside the leaf) to a region of **lower concentration** (outside the leaf)
- It occurs **passively**, without the need for energy.

### Why the other options are incorrect:
- **B. Transpiration pull** – Refers to the upward movement of water from roots to leaves, not gas movement.
- **C. Osmosis** – Is the movement of **water** across a semi-permeable membrane, not gases like oxygen.
- **D. Active transport** – Requires energy to move substances **against a concentration gradient**, which isn’t the case for oxygen exiting the leaf.

So, **oxygen exits the stomata by diffusion** — **A. diffusion** is the correct answer.