Final answer:
Dom Cristão may feel obligated to answer the Speaker's questions due to societal norms, personal ethics, or political necessity, despite their opposing positions, revealing complexities in character interaction and plot advancement in a literary context.
Step-by-step explanation:
The reason why Dom Cristão, despite his position against the Speaker, feels he has to answer the Speaker's questions, could be rooted in the context of a dramatic conflict or a sense of duty and protocol within a literary work. In many narratives, characters who oppose each other may still engage in dialogue due to societal norms, personal ethics, political strategy, or the need to maintain appearances. Although oppositional by stance, Dom Cristão might recognize the Speaker's authority or feel compelled by honor or the rule of law to respond. Examples in literature often show adversaries engaged in discourse as a means to further plot development or to reveal character dynamics and motivations.