Invasive species are not native species that cause harm to the new environment.
This can happen when they have a faster growth rate than native species or when they don't have any predators in the new environment, so their population growths very quickly.
Kudzu is a vine native to Southeast and East Asia, that is considered invasive in other parts of the world, particularly North America, this is because it grows rapidly over other plants, blocking the light and causing their death, which means the animals that feed on them cannot do it anymore.