Logos is a Greek term used especially in rhetoric, referring to the philosophical component of speeches. Through logos, the narrator addresses his audience using inductive methods, seeking that his words have not only a literal meaning but also have a subjective philosophical meaning, capable of motivating the audience and convincing them regarding the content of the speech.
I would say B. Only Ranger B is correct because introducing an invasive species has never helped the environment ever, plant or animal. The Asian Carp, the Asian Chestnut Tree...