Which of the following is/are (an) exotic species?
All these are exotic species. An exotic species is one that historically lives in a particular place, but has been moved to a new geographic location due to human interference. These exotic species can turn invasive and wreak havoc as water hyacinth (Eichhornia) did, by drying up our rivers. Parthenium is also a weed that made our soils infertile. Lantana is a weed that has spread around in a lot of places..