Which letter in the alphabet takes three strokes to write?

The letter S is typically formed using three distinct strokes in traditional calligraphy practices. The first stroke begins at the top, curving downward to form the upper curve of the S. The second stroke then continues from the bottom of that upper curve and curves upward to create the lower loop. Finally, the third stroke completes the lower part of the S, manifesting the shape of the letter.

In contrast, other letters such as Z, X, and P require fewer strokes to complete. For example, Z can be written with just three angular lines, while X consists of two diagonal lines crossing each other. The letter P can be drawn with just two strokes: one vertical line and one semicircular arc to cap it off. Therefore, the choice of S as the letter that takes three strokes aligns with standard calligraphic techniques, making it the correct answer.