The tone in the last stanza is regretful. The poem is about a man who received advice from a wise man that he can give away all his wealth but not his heart. He's told that once you give away your heart, you lose it and end up regretting it. He experiences it and regrets afterwards.
Answer: A. It reveals to the reader how military conflict is eventually inevitable.
Explanation:
The excerpt shows why human military conflict is inevitable because humans adhere to different political ideologies and conditions such that one group of humans will attempt to impose a certain political condition on another which they will reject.
In the second group rejecting the condition, they will enter into a conflict with the first group which might then lead to military conflict.
