Answer:Portia uses emotional tone when persuading Brutus to tell her the secret.Explanation:Portia is Brutus's wife in Shakespeare's play "Julius Caesar". When alone, Portia feels that Brutus is concealing some secret from her, which she instantly wants to know. She has been trying before as well to know it, but Brutus was not ready to reveal it (the secret of plan to kill Julius Caesar).Now she has got another chance and to persuade Brutus by appealing to his emotions. She makes a reference to their marriage which is a bond of trust and open communication in these lines;"I should not need, if you were gentle Brutus. Within the bond of marriage, tell me, Brutus, Is it excepted I should know no secrets That appertain to you? Am I yourself But, as it were, in sort or limitation, To keep with you at meals, comfort your bed, And talk to you sometimes? Dwell I but in the suburbs Of your good pleasure? If it be no more, Portia is Brutus' harlot, not his wife."This appeal to Brutus emotions works instantly and he becomes ready to reveal the secret by saying;"You are my true and honourable wife, As dear to me as are the ruddy drops That visit my sad heart"