This question has options. How would someone go about accomplishing this goal?
To tie an overhand knot,

Choose your answer from: (I) make a loop that looks like the loop of a roller coaster. Insert one end of the string into the loop. Pull both ends in opposite directions so that the knot becomes tight.; (II) make a loop that looks like the loop of a roller coaster. Insert one end of the string into the loop. Pull both ends in the same direction so that the knot becomes tight.;
(I)