What describes an invasive species?

An invasive species is best described as a non-native species that spreads rapidly and can disrupt local ecosystems. These species often thrive in new environments due to a lack of natural predators, allowing their populations to grow unchecked. As they proliferate, invasive species can outcompete native flora and fauna for resources such as food, space, and light. This disruption can lead to significant ecological changes, affecting biodiversity and the overall health of the ecosystem. Invasive species may alter habitat structure, affect nutrient cycling, and even introduce new diseases, posing serious threats to native species and local ecosystems.

The other descriptions do not align with the definition of an invasive species. A native species thriving in its environment does not necessarily disrupt the ecosystem; beneficial species provide resources without negative impacts. Lastly, a species that has no impact on the ecosystem isn’t considered invasive, as invasiveness inherently involves causing disruption to the ecological balance.