Correct Option: B. Habitat restoration Detailed Explanation: Why Habitat Restoration is the Correct Answer:

1. Definition of Habitat Restoration: Habitat restoration involves the process of returning a degraded or destroyed ecosystem to a stable, healthy state. This can include replanting native vegetation, removing invasive species, and restoring natural water flows. The goal is to create an environment that supports a diverse range of species.
2. Importance of Biodiversity: Biodiversity refers to the variety of life in a particular habitat or ecosystem. It is crucial for ecosystem resilience, productivity, and stability. High biodiversity allows ecosystems to better withstand environmental changes and stresses, such as climate change, disease, and habitat loss.
3. How Habitat Restoration Maintains Biodiversity:
4. Re-establishing Native Species: By restoring habitats, we can reintroduce native species that may have been lost due to human activities. Native species are often better adapted to local conditions and can thrive in restored environments.
5. Creating Ecological Corridors: Restoration can help create corridors that connect fragmented habitats, allowing species to migrate, find mates, and access resources, which is essential for maintaining genetic diversity.
6. Enhancing Ecosystem Services: Healthy ecosystems provide services such as pollination, water purification, and carbon sequestration. By restoring habitats, we enhance these services, which in turn supports a wider range of species.

Why the Other Options are Incorrect or Weaker: A. Monoculture Farming: - Definition: Monoculture farming is the agricultural practice of growing a single crop species over a wide area for many consecutive years. - Impact on Biodiversity: This practice reduces biodiversity significantly because it eliminates the variety of plants and animals that would naturally coexist in a diverse ecosystem. It can lead to soil degradation, increased vulnerability to pests, and a decline in ecosystem resilience. C. Urban Development: - Definition: Urban development refers to the expansion of cities and towns, often leading to the conversion of natural habitats into residential, commercial, or industrial areas. - Impact on Biodiversity: Urban development typically results in habitat destruction, fragmentation, and pollution, which severely threaten local wildlife and plant species. It often leads to a loss of biodiversity rather than its maintenance. D. Chemical Pesticide Application: - Definition: This involves the use of chemical substances to kill pests that threaten crops. - Impact on Biodiversity: While pesticides can protect crops, they can also harm non-target species, including beneficial insects, birds, and aquatic life. The overuse of pesticides can lead to a decline in biodiversity and the development of pesticide-resistant pests, creating a cycle of dependency on chemicals. Summary of Key Points:

• Habitat restoration is the most effective strategy for maintaining biodiversity as it focuses on reviving ecosystems and supporting native species.
• Monoculture farming, urban development, and chemical pesticide application all negatively impact biodiversity by reducing habitat variety and harming non-target species.
• Restoring habitats enhances ecosystem services and resilience, which are vital for sustaining diverse biological communities.
• Effective ecological management practices prioritize the health of ecosystems to ensure long-term biodiversity conservation.

By understanding these concepts, students can appreciate the importance of ecological management practices in preserving biodiversity and the overall health of ecosystems.