Question

why are invasive species dangerous to the environment?
they pollute the environment.
they are all voracious predators.
they threaten biodiversity.
they are nonrenewable.

Explanation:

Invasive species are dangerous to the environment mainly because they threaten biodiversity. Invasive species often outcompete native species for resources (like food, habitat, etc.), which can lead to a decline in native species populations and disrupt ecosystems. The option "They pollute the environment" is incorrect as invasive species don't typically pollute in the way pollutants like chemicals do. "They are all voracious predators" is wrong because not all invasive species are predators (some are plants, for example, that outcompete native plants). "They are nonrenewable" is irrelevant as the concept of renewable/non - renewable doesn't apply to invasive species in this context.

Answer:

They threaten biodiversity.