Many species of cockroaches are :-

Options

A. Wild
B. Pests
C. Have economic importance
D. Both (a) & (c)

Answer

**Step-by-Step Solution:**

1. **Identify the Classification of Cockroaches:**
- Cockroaches belong to the class Insecta and are part of the order Blattodea. They are commonly recognized as insects.

2. **Understand the Habitat of Cockroaches:**
- Cockroaches are typically found in dirty environments. They thrive in unsanitary conditions, which contributes to their association with disease transmission.

3. **Recognize the Role of Cockroaches in Disease Spread:**
- Cockroaches are known carriers of various pathogens. They can spread diseases such as cholera and dysentery due to their presence in contaminated areas.

4. **Discuss the Characteristics of Cockroaches:**
- Most species of cockroaches are wild and not domesticated. They are characterized by their rapid reproduction rates and fast growth, which allows them to proliferate quickly in suitable environments.

5. **Evaluate the Ecological Importance of Cockroaches:**
- Cockroaches have minimal ecological importance. They do not contribute significantly to the ecosystem, especially in terms of pest control or aiding in crop production.

6. **Conclusion:**
- In summary, many species of cockroaches are wild insects that thrive in dirty habitats, reproduce rapidly, and are known for spreading diseases, but they hold little ecological value.