How do invasive species impact local ecosystems?

Invasive species often disrupt local food chains and outcompete native species, which is why this option is correct. When an invasive species is introduced to a new environment, it may not have natural predators, allowing it to reproduce rapidly. This can lead to a decrease in the population of native species that rely on the same resources, such as food and habitat. As invasive species establish themselves, they can alter physical environments and nutrient cycles, which can have cascading effects throughout the ecosystem. This competition for resources not only threatens the existence of native species but also can destabilize entire ecosystems by altering predator-prey dynamics.

The other options suggest outcomes that are not characteristic of invasive species. For instance, the notion that invasive species increase biodiversity contradicts their known effects on local ecosystems, where they typically reduce the variety of native organisms. Similarly, the idea that they enhance habitats fails to recognize how invasive species can degrade the conditions that native species require for survival. Lastly, suggesting that invasive species have no significant impact overlooks a considerable body of evidence demonstrating their detrimental effects on ecosystems globally.