The spread of bird flu can be prevented by

Options

A. Culling
B. Breeding
C. Separation of infected birds from the flock of undiseased ones
D. Both (1) & (3)

Answer

**Step-by-Step Solution:**

1. **Understanding Bird Flu**: Bird flu, also known as avian influenza, is a viral infection that can spread among birds and can also infect humans. Understanding the disease is crucial for prevention.

2. **Culling**: This refers to the process of eliminating infected or undesirable birds from the flock. By culling, we can reduce the number of infected birds, which helps in controlling the spread of the virus.

3. **Breeding**: While breeding itself does not directly prevent the spread of bird flu, it can be used to develop disease-resistant strains of birds. This is a long-term strategy that can help in reducing the susceptibility of birds to infections.

4. **Separation of Infected Birds**: This involves isolating infected birds from healthy ones. By separating the infected birds, we can prevent the virus from spreading to the rest of the flock.

5. **Combining Strategies**: The most effective way to prevent the spread of bird flu is to implement a combination of culling and separating infected birds. Therefore, both culling and separation are key strategies.

6. **Conclusion**: The spread of bird flu can be effectively prevented by culling infected birds and separating them from healthy ones. Thus, the correct answer is that both culling and separation are effective methods.

**Final Answer**: The spread of bird flu can be prevented by culling and separating infected birds from the flock.

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