………..is a protective device in a community.

Options

A. Parasitism
B. Mutualism .
C. Mimicry
D. Competition

Explanation

To solve the question "……..is a protective device in a community," we need to analyze the given options: parasitism, mutualism, mimicry, and competition. Let's break down each option step by step.

### Step-by-Step Solution:

1. **Understanding Parasitism**:
- Parasitism is a relationship where one organism (the parasite) benefits at the expense of another organism (the host).
- Example: The plasmodium parasite that causes malaria in humans.
- **Conclusion**: This does not serve as a protective device; rather, it harms the host.

2. **Understanding Mutualism**:
- Mutualism is a symbiotic relationship where both species benefit from the association.
- Example: Honey bees pollinating flowers while obtaining nectar.
- **Conclusion**: While beneficial, mutualism is not primarily a protective device.

3. **Understanding Mimicry**:
- Mimicry involves one organism resembling another, which can provide protection from predators.
- Example: Certain insects like mantises or moths that mimic leaves or twigs to avoid being eaten.
- **Conclusion**: This is indeed a protective device as it helps organisms avoid predation.

4. **Understanding Competition**:
- Competition occurs when two organisms vie for the same resources, leading to harm for one or both.
- Example: Two dogs fighting over food.
- **Conclusion**: This does not provide protection; it represents a struggle for survival.

5. **Final Decision**:
- Based on the analysis, the correct answer to the question is **mimicry**, as it serves as a protective device in a community.

### Final Answer:
**Mimicry** is a protective device in a community.

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