Question

what characterizes invasive species? they have no impact on local environments, they cause harm to the new environment, they are always native to the ecosystem.

Explanation:

To determine the correct option, we analyze each choice:

• "They have no impact on local environments" is incorrect because invasive species do impact local environments, often negatively.
• "They cause harm to the new environment" is correct. Invasive species are non - native organisms that, when introduced to a new ecosystem, can outcompete native species, disrupt food webs, and cause ecological and economic harm.
• "They are always native to the ecosystem" is incorrect. By definition, invasive species are non - native to the ecosystem they invade.

Answer:

B. They cause harm to the new environment.