What aspect of an organism makes it an invasive species?

Question

a
It is from a different ecosystem.
b
It does harm and is introduced to the ecosystem.
c
It is harmful to organisms in all ecosystems.
d
It has no predators in the new ecosystem.

Answer 1

b) It does harm and is introduced to the ecosystem.

An invasive species is one that is introduced, intentionally or accidentally, into an ecosystem outside of its native range and has negative impacts on the environment, economy, or human health. This can include harming native organisms, competing for resources, altering habitats, and disrupting ecosystem processes.