Which of the following best describes a haunch in letter design?

The term "haunch" in letter design refers specifically to a curve or bend that is typically present in certain letterforms, particularly in serif fonts. This curvature adds visual interest and can affect the overall balance and legibility of the letter. For example, in the letter "R," the haunch contributes to the shape where the vertical stroke meets the rounded part, enhancing the letter’s aesthetic qualities.

The other choices do not accurately capture the essence of a haunch. A long stroke, a diagonal tail, and a raised section of a letter describe different characteristics of letterforms but do not align with the specific definition of a haunch. Recognizing this helps in understanding the nuances in letter design and contributes to a better overall practice in calligraphy.