To which font-family does the font designed for better readability belong?

The font designed for better readability belongs to the serif font family. Serif fonts are known for their small decorative lines or flourishes at the end of the strokes that make up each letter. These lines help guide the reader's eye from one letter to the next, which makes it easier to read large blocks of text. Examples of serif fonts include Times New Roman, Georgia, and Garamond.

However, it's worth noting that while serif fonts are generally considered more readable for print media, sans-serif fonts like Arial and Helvetica are often preferred for digital media because they appear clearer and crisper on screens. Additionally, some fonts are specifically designed for readability, such as Verdana, which was designed to be highly legible on computer screens.