The set of lines that suggests his response to the Easter Rising goes beyond personal animosity are
4. He had done most bitter wrong
To some who are near my heart,
Yet I number him in the song
During the Easter Riots, there were 66 killed and 16 executed Irish insurrectionists, and some of them migh have been friends and loved ones for the speaker. After these events, he is still coping with the tragedy and wondering whether the rebellion was worth it. Still, despite all the violence he feels compelled to acknowledge these revolutionaries in his poem.
I think it’s c introduction thesis
Since 'altruism' means 'feelings and behavior that show a desire to help other people and a lack of selfishness', and this word 'altruistic' ends with -ic, we can assume, based on its structure, that this is an adjective that is used to describe a person who behaves in such a way.