The correct option is 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. Promoting Biodiversity: Biodiversity refers to the variety of life in a particular habitat or ecosystem. Habitat restoration is effective in promoting biodiversity because it:
3. Re-establishes Ecosystem Functions: Healthy ecosystems provide essential services such as pollination, nutrient cycling, and habitat for various species. By restoring habitats, we can support these functions and the species that rely on them.
4. Increases Species Richness: Restored habitats can support a wider variety of species, including those that may have been driven out by habitat destruction or degradation. This leads to a more resilient ecosystem.
5. Enhances Connectivity: Restoration can create corridors between fragmented habitats, allowing species to migrate, find mates, and access resources, which is crucial for maintaining genetic diversity.
6. Long-term Sustainability: Unlike other practices, habitat restoration focuses on long-term ecological health rather than short-term gains. It aims to create a self-sustaining ecosystem that can thrive without ongoing human intervention.

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 is detrimental to biodiversity as it reduces habitat complexity and eliminates the variety of species that can thrive in diverse ecosystems. It often leads to soil degradation, increased vulnerability to pests, and a decline in ecosystem services. C. Urban Sprawl: - Definition: Urban sprawl refers to the uncontrolled expansion of urban areas into surrounding rural land. - Impact on Biodiversity: Urban sprawl typically leads to habitat destruction, fragmentation, and pollution, which severely threaten local wildlife and plant species. It reduces the available natural habitats and can lead to the extinction of species that cannot adapt to urban environments. D. Overgrazing: - Definition: Overgrazing occurs when livestock graze an area of land too intensively, preventing vegetation from recovering. - Impact on Biodiversity: This practice can lead to soil erosion, desertification, and a decline in plant diversity. It disrupts the balance of the ecosystem and can lead to the loss of species that depend on healthy vegetation for food and habitat. Summary of Key Points:

• Habitat restoration is the most effective practice for promoting biodiversity as it aims to return ecosystems to a healthy state.
• It enhances ecosystem functions, increases species richness, and promotes long-term sustainability.
• Monoculture farming, urban sprawl, and overgrazing are detrimental to biodiversity, leading to habitat loss and degradation.
• Effective ecological management should prioritize restoration efforts to support diverse and resilient ecosystems.