Answer:
The answer is option 4. Unoka
Step-by-step explanation:
In literature, the foil refers to a character who differs in many aspects from the protagonist, becoming the opposite of this one. In “Things that fall apart” by Chinua Achebe Unoka is Okonkwo’s father. He is the foil because, unlike Okonkwo, he was not masculine and hated to see blood. That is why he did not become a warrior. For this reason, Okonkwo never liked his father's personality.