What distinguishes serif fonts from sans-serif fonts?

• A. They lack lines at ends.
• B. They are only used for headings.
• C. They have small lines at the ends of letters.
• D. They are always more legible on digital screens.

Answer: (C)

Serif versus sans-serif is defined by the presence or absence of small decorative strokes at the ends of letters. These small lines, or serifs, appear in serif fonts and give each letter a little tail. Sans-serif fonts lack those lines, resulting in clean, straight ends. This difference creates distinct visual feels: serif fonts tend to read as traditional and formal, especially in long print passages where the serifs can subtly guide the eye along a line. Sans-serif fonts read as modern and crisp, often preferred for digital screens and headings where sharp edges improve clarity at smaller sizes. The distinguishing feature is the presence of those small lines at the ends of letters, which is what makes serif fonts different from sans-serif. The other statements don’t hold as general truths—serifs aren’t absent in serif fonts, many serif fonts are used beyond headings, and legibility on screens isn’t universally higher for serif fonts.