Question

which pair of undefined terms is used to define the term parallel lines?
point and line
plane and line
point and ray
ray and line

Explanation:

In geometry, parallel lines are defined using the concept of a plane and a line. Parallel lines are two lines in the same plane that do not intersect. The other pairs (point and line, point and ray, ray and line) are not the pair of undefined terms used for the definition of parallel lines.

Answer:

plane and line