What defines a transversal?

A transversal is specifically defined as a line that intersects at least two other lines, typically in two-dimensional geometry. This intersection can occur at different angles, and the lines crossed can be either parallel or non-parallel. The significance of a transversal arises in the study of angles formed when it crosses other lines, as these angles exhibit specific relationships that are fundamental in various geometric concepts, such as alternate interior angles and corresponding angles.

In contrast, other options do not accurately describe the properties of a transversal. For instance, a line with no endpoints is a definition of a line itself but does not mean anything about its intersections with other lines. Similarly, a line that is parallel to another line does not intersect it, and a line that only intersects one other line does not fulfill the requirement of being a transversal, which must intersect at least two lines.