What is limiting factor ?

Explanation

### Step-by-Step Text Solution:

1. **Definition of Limiting Factor**: A limiting factor is a condition or resource that is in short supply and restricts the rate of a process, such as photosynthesis.

2. **Context in Photosynthesis**: In the context of photosynthesis, several factors can be limiting. These include carbon dioxide (CO2), water, temperature, pH, and sunlight.

3. **Examples of Limiting Factors**:
- **Carbon Dioxide**: If there is not enough CO2 available, the rate of photosynthesis will decrease.
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