Answer:
Barnabas used positive apologetics. A positive apologist offers his or her testimony to those who are hurting. You exude sympathy, and people in crisis are drawn to you. You are soft-spoken, kind, and your heart for others is a winsome tool for God to use.
To add on to this....
An example of negative apologetics would be Paul. His approach in discussing faith ended up in heated debates, yelling, feeling angry, and will result in failing to introduce the truth of Jesus Christ.
Contextual, or cultural apologetics is probably the best when mixed with positive apologetics to reach those in this world today. Using cultural apologetics you use current issues, crises, events, music, movies, or anything of that nature to get into a discussion of faith in Our Lord and Savior.
God Bless,
Crystal