Effect of pollution is first and most marked on

Options

A. Natural flora of a place
B. Natural geochemical cycle
C. Natural gaseous cycle
D. Natural balance of our environment

Explanation

**Step-by-Step Solution:**

1. **Understanding Pollution Effects**: Pollution affects various components of the environment, including air, water, soil, and living organisms. However, the impact is not uniform across all components.

2. **Identifying the Most Affected Component**: Among the various components, the natural flora (plants and vegetation) is often the first and most significantly affected by pollution. This is due to their direct exposure to pollutants in the air, soil, and water.

3. **Mechanism of Impact**: Pollution introduces harmful substances such as gases (e.g., sulfur dioxide, nitrogen oxides) and solids (e.g., heavy metals, particulate matter) into the environment. These pollutants can disrupt the natural geochemical cycles and gaseous cycles that are essential for plant health.

4. **Consequences for Flora**: The introduction of pollutants can lead to several problems for plants, including:
- **Nutrient Absorption Issues**: Pollutants can interfere with the plants' ability to absorb essential nutrients from the soil.
- **Growth Inhibition**: As a result of nutrient deficiencies and toxic effects, plants may exhibit stunted growth or even die.

5. **Conclusion**: Therefore, the correct answer to the question about the first and most marked effect of pollution is on the natural flora of a place.

**Final Answer**: The effect of pollution is first and most marked on natural flora.

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