Effect of pollution is first marked on

Options

A. Microorganisms
B. Green vegetation of an area
C. Food crop
D. None of these

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks about the first organisms or entities that show the effects of pollution. We need to analyze the options provided to determine which one is most affected initially by pollution.

2. **Analyzing the Options**:
- **Option A: Microorganisms**: While microorganisms can be affected by pollution, they are often resilient and can survive in extreme conditions by forming spores. Therefore, they may not be the first to show effects.

- **Option B: Food Crops**: Food crops can also be affected by pollution, but they have various protective measures. Farmers can use fertilizers, pesticides, and irrigation to mitigate the effects of pollution on crops. Thus, they are not the first to show signs of pollution.

- **Option C: Green Vegetation**: This option includes forests, grasslands, and shrub lands. Green vegetation is directly dependent on soil and water quality, which are often the first to be contaminated by pollution. Therefore, this option is likely to show the effects of pollution first.

3. **Conclusion**: After analyzing all the options, it is clear that the correct answer is **green vegetation of an area**. This vegetation is most susceptible to the adverse effects of pollution due to its reliance on clean soil and water.

4. **Final Answer**: The effect of pollution is first marked on **green vegetation of an area**.

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