What form or rule is demonstrated in this sentence?

Question

The Russian defector, a sailor who had jumped ship near Canada, became a Christian.
commas used with an appositive
direct address
two or more adjectives before a noun

Answer 1

The form demonstrated in the sentence "The Russian defector, a sailor who had jumped ship near Canada, became a Christian" is commas used with an appositive. The phrase "a sailor who had jumped ship near Canada" is an appositive that provides additional information about "The Russian defector" and is set off by commas.