Christian Apologetics is a defense of the faith, answering honest questions that serve as barriers that prevents someone coming to faith, to persuade, providing evidence sufficient to proving a case, using history, archaeology , natural science, primary eye witnesses testimony, secondary and tertiary evidence.
Saint Peter engaged in apologetics which by definition is reasoning with people in defense of the Christian faith.
1 Peter 3:15 is a foundational verse for Christian apologetics.
"But in your hearts revere Christ as Lord. Always be prepared to give an answer to everyone who asks you to give the reason for the hope that you have. But do this with gentleness and respect."
The Apostle Paul in a literal sense engaged apologetics when he stayed in Corinth for a year and a half just to teach, to reason with and to answer questions for the Corinthian citizens who had honest questions.
The Apostle Paul also engaged apologetics when persuading King Agrippa. The great Apostle Paul knew by the leading of The Holy Spirit when to preach, when to teach and when to sit with people and when to answer their questions so that the barriers to their believing would be removed.
See Acts 18:11 which records "So Paul stayed in Corinth for a year and a half, teaching them the word of God."
