Logos: Focuses attention on the message. Often called a logical appeal or an “appeal to a reason”. Frequently uses data to support its claim.
In other words Logos is logic
Ethos: Focuses attention on the writers or speakers trustworthiness. Takes one of two forms “ appeal to character” or “appeal to credibility
In other words Ethos is Credibility
Pathos: Appeal to emotion, which is empathy, which also pertains to the experience of or sensitivity toward emotion
Kairos: Appeal to Timeless, which is also a type of persuasion.