I would choose knight-at-arms, haggard, steed as the correct answer. Your task is to choose words which explain the setting, as well as the mood of this poem. Setting refers to the location of a story, to the time, to people present, etc. which can be seen in words knight-at-arms and steed (the horse he rode when he met the woman). The word haggard (meaning exhausted) refers both to the knight, and the poem itself which tells us a story of how a knight fell in love with a woman, who turned out to be an illusion.
Well since you didn’t provide any context, what you need to do is read his speech and answer what part is the least boring or more Intresting then the rest. Sorry if this doesn’t help