Vector insects are which

Options

A. Spread disease
B. Destroy crop
C. Spoil soil
D. Act as scavengers.

Answer

**Step-by-Step Solution:**

1. **Understanding Vector Insects**: Vector insects are organisms that transmit pathogens (disease-causing agents) from one host to another. They play a crucial role in the spread of diseases.

2. **Identifying the Role of Vectors**: These insects act as agents that carry infectious pathogens, such as viruses, bacteria, and parasites, into living organisms. This transmission can occur between different hosts.

3. **Examples of Vector Insects**: Common examples of vector insects include mosquitoes, ticks, fleas, and certain flies. For instance, the female Anopheles mosquito is known for transmitting the malaria-causing parasite, Plasmodium.

4. **Analyzing the Options**:
- Option 1: "Spread disease" - This is correct as vector insects are primarily known for spreading diseases.
- Option 2: "Destroy crops" - This is incorrect; while some insects can harm crops, they are not classified as vectors.
- Option 3: "Spoil soil" - This is also incorrect; vector insects do not spoil soil.
- Option 4: "Act as scavengers" - This is incorrect as scavengers feed on dead organic matter, not necessarily acting as vectors.

5. **Conclusion**: The correct answer is that vector insects are those that "spread disease."

**Final Answer**: Vector insects are those that spread diseases.

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