What is a transversal in relation to parallel lines?

A transversal is defined as a line that intersects at least two other lines at different points. In the context of parallel lines, the transversal cuts through both lines, creating various angles that are of interest in geometry, such as corresponding angles and alternate interior angles. These angle relationships can help determine whether the lines are parallel or provide other important information related to geometric proofs and problem-solving.

While a line parallel to another line is not relevant to the definition of a transversal, and being perpendicular does not describe the crossing nature of a transversal, connecting midpoints of parallel lines focuses on a different concept entirely—specifically, it pertains to segments rather than a line that crosses other lines. Thus, the definition encapsulated in the correct answer accurately describes the fundamental role of a transversal in the study of parallel lines and geometry in general.