Answer:
Option 1. This is a vertical pair of angles because they are two nonadjacent (not next to each other) angles formed by intersecting lines. The sides of one angle are the opposite rays to the sides of the other angle. (Angle 5=Angle 7)
Option 2 and 4 are wrong as the angles are not created by a set of parallel lines and a transversal.
Option 3 is wrong as the angles are not adjacent.
Option 5 is wrong as the angles do not have a sum of 90°.