The construction being done in the steps described is an angle bisector.
Step 1 introduces a line segment \( LD \) and shows a pencil pointing towards point \( D \), indicating that an angle is being created. Step 2 indicates that a line intersects the segment at point \( E \) and provides additional descriptions relevant to constructing angles. The arcs mentioned in Step 4 further suggest that an angle is being bisected. Therefore, the answer is:
angle bisector.