How do invasive species threaten biodiversity? a. They create new habitats for native species. b. They compete with native species for resources. c. They increase the overall population of all species.

The correct answer is: **b. They compete with native species for resources.** **Explanation:** Invasive species pose significant threats to biodiversity through several mechanisms, with competition for resources being one of the most common. Here's a breakdown of each option: - **a. They create new habitats for native species.** *This statement is generally incorrect.* Invasive species typically alter or degrade existing habitats, making them less suitable for native species rather than creating new habitats that benefit natives. - **b. They compete with native species for resources.** *This is correct.* Invasive species often compete with native species for essential resources such as food, water, and shelter. This competition can lead to the decline or extinction of native species, thereby reducing biodiversity. - **c. They increase the overall population of all species.** *This statement is incorrect.* While invasive species may increase their own population, they often have a negative impact on other species, leading to a decrease in overall biodiversity. **Additional Impacts of Invasive Species on Biodiversity:** 1. **Predation:** Some invasive species prey on native species that have no natural defenses against them. 2. **Disease:** Invasive species can introduce new diseases to which native species have no immunity. 3. **Hybridization:** They can interbreed with native species, leading to hybrid offspring that may dilute the genetic integrity of native populations. 4. **Habitat Modification:** Invasive plants can alter soil chemistry, water availability, and fire regimes, further impacting native biodiversity. Managing and controlling invasive species is crucial for preserving native biodiversity and maintaining healthy ecosystems.