Question

select the appositive or appositive phrase. billions of years ago, a large asteroid crashed into mercury and formed the caloris basin, one of the largest formations of this kind in the solar system.

Explanation:

An appositive is a noun or noun - phrase that renames another noun right beside it. In the given sentence, "one of the largest formations of this kind in the solar system" renames "the Caloris Basin".

Answer:

one of the largest formations of this kind in the solar system