Most important ecological factor is light.

Answer

### Step-by-Step Solution:

1. **Understanding the Ecosystem**: An ecosystem is a community where living organisms (biotic components) interact with their environment (abiotic components).

2. **Defining Biotic and Abiotic Components**:
- **Biotic Components**: These include all living organisms such as plants, animals, fungi, and microorganisms.
- **Abiotic Components**: These are the non-living elements of the environment, which include factors like light, temperature, water, soil, and minerals.

3. **Evaluating Ecological Factors**:
- Among the abiotic factors, light, temperature, and water are significant.
- Light is essential for photosynthesis in plants, which forms the base of most food chains.

4. **Analyzing Temperature**:
- Temperature is a critical ecological factor as it influences the metabolic rates of organisms.
- It affects enzyme activity, which is vital for biochemical processes in living organisms.
- Temperature varies with geographical location, decreasing from the equator to the poles, affecting biodiversity and species distribution.

5. **Considering Water**:
- Water is also a crucial factor as it is necessary for all forms of life.
- It affects physiological processes and is vital for habitats.

6. **Conclusion**:
- While light is important, the most critical ecological factor is temperature.
- Therefore, the statement "the most important ecological factor is light" is false.

### Final Answer:
The statement is false; the most important ecological factor is temperature, not light.

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