Answer:
"Ems" (em)
Explanation:
“Ems” (em): Is is a scalable unit that is used in web page text or markup language like HTML, it allows page elements have a consistent relative font sizes.
It is important to know that an em (1em) is equal to the current font-size, for instance, if the font-size of the document is 10pt, 1em is equal to 10pt. Ems are scalable in nature, so 2em would equal 20pt.
