In one or two sentences, describe how an invasive species can be introduced into an ecosystem by humans. Name a specific situation and species and how it would affect the ecosystem.(2 points)

An invasive species can be introduced into an ecosystem by humans through intentional or unintentional actions such as introduction for aesthetic or commercial purposes, or through accidental transport. An example of this is the introduction of European earthworms in North America, which can alter soil structure and nutrient cycling, affecting plant communities and soil-dependent organisms.