#Of whom was Peter an apostle?

Peter was an apostle of Jesus Christ. [1:1]

#To whom did Peter write?

Peter wrote to the foreigners of the dispersion, the chosen ones, throughout Pontus, Galatia, Cappadocia, Asia, and Bithynia. [1:1]

#How did the foreigners become the chosen ones?

The foreigners became the chosen ones according to the foreknowledge of God the Father, and by the sanctifying of the Holy Spirit. [1:1-2]