Which organelle releases oxygen?

Options

A. Chloroplast
B. Mitochondrion
C. Golgi apparatus
D. Ribosome

Explanation

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks which organelle is responsible for releasing oxygen.

2. **Identifying the Process**: Oxygen is released during the process of photosynthesis. This process is crucial for converting light energy into chemical energy in plants.

3. **Identifying the Organelle Involved**: Photosynthesis occurs in specific organelles known as plastids. Within plastids, the chloroplast is the organelle that specifically carries out photosynthesis.

4. **Function of Chloroplast**: Chloroplasts contain chlorophyll, the pigment that captures light energy, and they are responsible for converting carbon dioxide and water into glucose and oxygen. Thus, they release oxygen as a byproduct of this process.

5. **Evaluating Other Options**:
- **Mitochondria**: Known as the powerhouse of the cell, they produce energy (ATP) through cellular respiration but do not release oxygen.
- **Golgi Apparatus**: Functions as the packaging and distribution center for proteins and lipids, not involved in oxygen release.
- **Ribosomes**: Act as the protein factories of the cell, synthesizing proteins but not involved in oxygen production.

6. **Conclusion**: Based on the above analysis, the organelle that releases oxygen is the chloroplast.

**Final Answer**: The correct option is **chloroplast**.

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