which of the following is being constructed in the image?

In the shown image of construction, first a line constructed.Then they draw an angle.They make an arc to represent the angle on the constructed line in step 1.They cut the arc by measuring the angle.They kept open same width of the compass and they cut another arc above.They joined the points to make equal corresponding angles.After joining points, we got a parallel line we draw in first point.
Therefore, correct option is:A parallel line to a given line through a point not on the line.