Answer:
Ikemefuna serves the purpose that Oknokwo's tribe will not go to war with Mbaino: A young boy named Ikemefuna is given to Umuofia in order to avoid war. While living with Okonkwo, Ikemefuna becomes like a son to Okonkwo. In fact, he is more of a son than Nwoye is.
Explanation:
Here is a sentence: As she was leaving, I was watching her from my car, heavy-hearted, recalling with melancholy the days we had spent together. The context clue of restatement or synonym here is heavy-hearted. Even if the reader doesn't know the meaning of the word melancholy, they will get a hint to its meaning from this restatement.