anyways, Ethos are like ethics, like the advertisement is based off a respected character, like Vanessa Hudgens Advertising for Neutragena.
Logos are based off facts, and it's suppose to be logical. Like, This toothpaste contains whitening-chemicals that may effective whiten your teeth.
Pathos are emotional, like a child shown all beaten up and such, and they are advertising a type of...band-aid? Something like that.