Metaphors are defined as the literary device that involves a comparison between two distinct objects for the purpose of clarifying or explaining an idea to the readers. Brutus employs several metaphors to convey that if he is going to join the plan against killing Caesar. The metaphor of 'young ambition's ladder of lowliness' to compare Caesar's actions once he becomes the king displays how Brutus justifies his joining in the brutal plan to kill Caesar.
Love is the answer you are looking for. Orsino is in love with Olivia. Olivia is in love with Cesario. Viola is in love with Orsino. Therefore your answer is Love.
