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 where native species can thrive and biodiversity can flourish.
2. Importance of Biodiversity: Biodiversity refers to the variety of life in a particular habitat or ecosystem. It is crucial for ecosystem resilience, providing essential services such as pollination, nutrient cycling, and climate regulation. High biodiversity also contributes to the stability of ecosystems, making them more resilient to changes and disturbances.
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. This helps to rebuild the ecosystem's complexity and interdependence.
5. Creating Suitable Conditions: Restoration efforts often focus on improving the conditions necessary for various species to thrive, such as soil quality, water availability, and shelter.
6. Enhancing Connectivity: Restored habitats can connect fragmented ecosystems, allowing species to migrate, reproduce, and maintain genetic diversity.

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 significantly reduces biodiversity 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 loss of ecosystem services. C. Urban Development: - Definition: Urban development refers to the expansion of cities and towns, often involving the conversion of natural habitats into residential, commercial, or industrial areas. - Impact on Biodiversity: Urban development typically leads to habitat destruction, fragmentation, and pollution, which severely threaten local wildlife and plant species. It often results in a decline in biodiversity as natural habitats are replaced with impervious surfaces and artificial structures. D. Chemical Pest Control: - Definition: Chemical pest control involves the use of pesticides and herbicides to manage pests and weeds in agricultural and urban settings. - Impact on Biodiversity: While it can temporarily protect crops, the use of chemical pest control can have detrimental effects on non-target species, including beneficial insects, birds, and aquatic life. Over time, it can lead to pesticide resistance and a decline in overall biodiversity. Summary of Key Points:

• Habitat restoration is the most effective practice for maintaining biodiversity as it focuses on rebuilding ecosystems and supporting native species.
• Monoculture farming, urban development, and chemical pest control all negatively impact biodiversity through habitat destruction, species loss, and ecosystem imbalance.
• Restoring habitats enhances ecosystem resilience and supports a diverse range of species, which is essential for the health of our planet.

Revision Summary:

• Habitat restoration is crucial for maintaining biodiversity by re-establishing native species and improving ecosystem conditions.
• Monoculture farming reduces biodiversity by promoting a single crop and eliminating diverse ecosystems.
• Urban development leads to habitat loss and fragmentation, threatening local wildlife.
• Chemical pest control can harm beneficial species and disrupt ecological balance, further reducing biodiversity.