An effective argument uses evidence, because if you are being bias, it isn't helpful.
Explanation:
First and foremost, one of the most important reasons to learn a foreign language is the stimulation it offers your mind. Like a young child grappling with language for the very first time, you find yourself lusting for knowledge and oozing curiosity at every turn.
(What I think is the) answer:
How someone talks of something through their perspective.
Explanation:
With a colleague (workplace mate) you'd talk from a professional standpoint but if you were to talk with a friend you'd speak more casually about stuff.
Ethos is whether or not it is credible or not. an example of ethos is if you are doing an in text citation and using a newspaper article then your ethos could be the authors credentials or schooling or maybe other things they have written