Identify the internal factor responsible for photosynthesis.

Options

A. Light
B. Carbon dioxide
C. Chlorophyll content
D. Temperature

Explanation

**Step-by-Step Solution:**

1. **Understanding Photosynthesis**: Photosynthesis is the process by which plants convert light energy into chemical energy, using carbon dioxide and water, to produce glucose and oxygen.

2. **Identifying Factors**: Photosynthesis is influenced by various factors, which can be categorized into internal and external factors. External factors include light, carbon dioxide, and temperature, while internal factors are those that are part of the plant itself.

3. **Recognizing Internal Factors**: Among the internal factors, chlorophyll is crucial. It is a green pigment found in the chloroplasts of plant cells.

4. **Role of Chlorophyll**: Chlorophyll absorbs light energy, primarily from the blue and red wavelengths, which is essential for the photosynthesis process. Without chlorophyll, plants would not be able to capture light energy effectively.

5. **Conclusion**: Therefore, the internal factor responsible for photosynthesis is chlorophyll, as it is essential for the absorption of light energy necessary for the process.

**Final Answer**: The internal factor responsible for photosynthesis is chlorophyll.

---