Interjections are basically exclamations such as: 'Ouch! Wow!', etc. So the correct answer is D, an exclamation point (!).
Answer:
a. Equality among all people should be encouraged.
Explanation:
The poem is explaining how all men are part of the study of mankind, this is a form to express that all the persons in this world are equally part of the mankind and therefore they must be considered equally important.
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It is their anthem, for example like the pledge of allegiance for america is our anthem.