Which of the following statements is accurate regarding the use of pen widths in calligraphy?

The statement that pen widths define the height and space of letters is accurate because the width of the pen directly affects the line quality and overall proportions of the characters in calligraphy. Calligraphy is characterized by varying line thicknesses, which are crucial for creating visual contrast and adding elegance to the letterforms.

Different pen widths contribute to the dynamic nature of typefaces and calligraphic styles. They help establish a rhythm in the lettering, as thicker strokes can denote prominence, while thinner strokes can convey delicacy or subtlety. This variation in line width allows calligraphers to create more expressive and visually appealing designs.

In contrast, the other options do not accurately convey the importance or role of pen widths in calligraphy. Statements that downplay their significance or simplify their functionality do not reflect the complexity and artistry involved in this practice. Understanding how pen widths influence letter height and spacing is fundamental to mastering calligraphy and producing well-crafted pieces.