**Photosynthesis in plants does not require oxygen.**

Photosynthesis is the process by which green plants and some other organisms use sunlight, carbon dioxide, and water to produce glucose (a type of sugar) and oxygen. It is an essential process for the survival of plants and the production of oxygen in the atmosphere. However, the process of photosynthesis does not directly require oxygen.

**Explanation:**

1. **Photosynthesis and its main requirements:**
- Photosynthesis is a complex biochemical process that occurs in the chloroplasts of plant cells.
- It requires three main components: sunlight, carbon dioxide, and water.
- Sunlight provides the energy needed for photosynthesis to occur.
- Carbon dioxide is absorbed by the plant from the surrounding air through tiny openings called stomata on the leaves.
- Water is taken up by the roots of the plant and transported to the leaves.

2. **The role of oxygen in photosynthesis:**
- Oxygen is not directly required for photosynthesis to occur.
- In fact, during photosynthesis, plants produce oxygen as a byproduct.
- The oxygen is released into the atmosphere through the stomata.
- This oxygen is a vital component for many living organisms, including humans, as it is necessary for respiration.

3. **The production of oxygen during photosynthesis:**
- During photosynthesis, sunlight is absorbed by the chlorophyll pigment in the chloroplasts.
- This energy is used to convert carbon dioxide and water into glucose and oxygen.
- The oxygen is released as a waste product into the atmosphere.
- The glucose produced during photosynthesis is used as a source of energy for the plant's growth and development.

4. **The importance of oxygen in the atmosphere:**
- Oxygen is essential for the survival of most living organisms.
- It is required for aerobic respiration, the process by which organisms convert glucose into energy.
- Oxygen is also involved in the processes of combustion and oxidation.
- Additionally, oxygen plays a crucial role in maintaining the balance of gases in the atmosphere.

In conclusion, photosynthesis in plants does not require oxygen directly. Instead, oxygen is produced as a byproduct of the photosynthetic process. The main requirements for photosynthesis are sunlight, carbon dioxide, and water. Oxygen is released into the atmosphere during photosynthesis and plays a vital role in supporting life on Earth.

Carbon dioxide is correct because plant need water,oxygen and sunlight when it prepared food