Answer:
The correct term for the species that form somewhere else that enters and disrupts a native ecosystem is "invasive species."
Step-by-step explanation:
An invasive species is a species that is non-native (alien) to the ecosystem under consideration and whose introduction causes or is likely to cause economic or environmental harm or harm to human health. Invasive species can outcompete native species for resources such as food and habitat, leading to the displacement or extinction of native species. They can also alter the ecosystem's physical and chemical properties, including hydrology and nutrient cycling, and promote the spread of diseases and parasites.