During Okonkwo’s exile, Obierika proves to be his friend. How do Obierika’s actions show true friendship?

Despite Okonkwo's embarrassing punishment and loss of titles, Obierika demonstrates his true friendship by visiting him in Mbanta during the second year of his exile in chapter 15. Obierika reveals his friendship by taking care of Okonkwo's business affairs in Umuofia and selling his yams. When Obierika arrives at Mbanta with his two sons, he presents Okonkwo with several bags of cowries, which are the profits from the sale of his yams. The two men then discuss the terrible fate of Abame, and Obierika confirms the rumors of the destructive white men. Obierika then explains to Okonkwo that he sold his seed-yams to sharecroppers and will continue to do so every year until Okonkwo returns to Umuofia permanently. Obierika visits Okonkwo once again during his exile to inform him about the white colonists encroaching on Umuofia and tells him about Nwoye's conversion to Christianity. Overall, Obierika proves his friendship by taking care of Okonkwo's business affairs during his exile and keeping him informed about the changing environment in Umuofia.