To construct a copy of the angle ∠XYZ and double it using ray YX, Isha should first measure the distance between point Y and the arc using a compass. This will allow her to replicate the arc so that the new angle can have the same structure.
After measuring the distance between point Y and the arc, the next step would typically involve using that measurement to create an intersection for the new arc representing the doubled angle.
So, the correct response is: He must measure the distance between point Y and the arc using a compass.