Final answer:
The water hyacinth is considered to be the most likely invasive species, known for disrupting aquatic ecosystems by rapidly growing and depleting resources needed by native species. (option a is the correct answer).
Step-by-step explanation:
The water hyacinth (Eichhornia crassipes) is the one considered most likely to be an invasive species among the choices given. This aquatic plant has caused significant ecological disruption in areas where it is not native. It grows quickly and can cover vast areas of water, blocking sunlight and depleting oxygen levels, which adversely impacts other aquatic life. Invasive species like the water hyacinth can radically change the ecosystems they enter, often leading to negative consequences for biodiversity and local species.
Examples of other invasive species in the United States include the purple loosestrife, zebra mussel, common buckthorn, and European starling, all of which have altered their new environments in harmful ways.
Considering the potential ecological impact, water hyacinth stands out as the most likely invasive species among the options. Vigilant monitoring and management strategies are crucial to mitigate the negative effects of invasive species on ecosystems.