Since you have not given any reference to the declaration you're talking about, i'll just go and try to help you how ethos could appeal to a speech or essay. Ethos refers to the credibility or personality/character of the speaker. For example, someone who has been through the World War II can be appeal to ethos when it comes to his experiences in it and to persuade you to do diplomatic negotiation instead.
what exactly are you asking here because all you gave was definitions
please explain further
The first answer should be correct, as none of the others make any sense.
