Which image represents the first step in constructing the copy of a line segment?

For this case, we observe that the four options represent the steps to build a line similar to the PQ line segment.
 We have then that the first step is:
 Opening of the compass from P to Q to measure the length of the PQ line.
 
 An image that represents the first step in constructing the copy of a line segment is:
 option 1

Dis the solution here