A theme (also known as a motif) is the main driving idea behind a poem. A theme or motif is not a summary of the poem, or a detail from the poem, but rather the emotion or motivation behind the poem. The theme might be "unrequited love" or "the power of traditions," but it wouldn't be "putting up walls between property lines," or anything else that specific.
Because theseus believed he could reenact the play part by part
the boy eats and drinks the milk and cookies that he knows he cannot pay for.
(I believe this is right)
If we're talking about ethos, pathos, or logos, the answer is ethos