Concept: A point equidistant from two intersecting lines lies on the angle bisectors of the angles formed by the lines.Explanation:• Consider two lines intersecting at point O.• Any point P is equidistant from the two lines if its perpendicular distances to both lines are equal.• The set of all such points P forms the two lines that bisect the vertical angles between the given lines.• Hence, the locus is a pair of perpendicular bisectors of the angles: both the internal and external angle bisectors.Answer: pair of bisectors of the angles between the two lines. (Option D)