Based on the description of the steps provided, the construction process is describing the creation of a perpendicular bisector.
In Step 1, a horizontal line segment LD is drawn, and a pencil pointing towards point D suggests a potential construction from point D.
In Steps 2 and 3, the left-to-right slanted line intersects the segment LD at point E, which indicates that this line is likely perpendicular to LD due to its intersection at point E, rather than simply being a parallel line.
Finally, the two arcs drawn in Step 4 further imply that the goal is to create a perpendicular bisector which would involve marking equidistant points from the endpoints of the segment LD.
Thus, the correct response is perpendicular bisector.