Final answer:
A regular hexagon and a line can intersect in three line segments.
Step-by-step explanation:
A regular hexagon is a polygon with six sides and six angles of equal measure. In this case, a line can intersect a regular hexagon in three line segments. These line segments are formed by the line intersecting the hexagon at three different points. Each line segment connects two neighboring vertices of the hexagon.
For example, consider a regular hexagon ABCDEF, and a line that intersects the hexagon at points P, Q, and R. The line segments formed are AP, BQ, and CR.
Therefore, the correct completion of the sentence is three line segments.
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