Concept:Paul appeals to Philemon to receive Onesimus no longer as a runaway slave, but as a dear brother in Christ.
Explanation:Onesimus was a slave who had left Philemon, but he later became a believer through Paul’s ministry.
Paul sent Onesimus back to Philemon with a personal letter.
In the letter, Paul urged Philemon to welcome Onesimus warmly, not with the harsh punishment slaves usually received.
Paul also offered to repay whatever loss Onesimus had caused Philemon.
The key message is that Philemon should treat Onesimus as a beloved brother in the Lord, not merely as a servant or slave.
Answer:D. Brother