Describe any three external factors affecting the process of photosynthesis

Explanation

**Step-by-Step Text Solution:**

1. **Introduction to Photosynthesis:**
- Photosynthesis is the process by which plants, known as autotrophs or producers, synthesize their own food. This process primarily occurs in the chloroplasts of plant cells and involves the conversion of carbon dioxide and water into glucose and oxygen, using sunlight as the energy source.

2. **External Factor 1: Carbon Dioxide Concentration**
- Carbon dioxide (CO2) is one of the essential substrates for photosynthesis. An increase in the concentration of carbon dioxide enhances the rate of photosynthesis. This is because CO2 is a raw material that plants utilize to produce glucose during the photosynthetic process.

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