Which ancient society is known for utilizing a logo-syllabic writing script?

The correct choice pertains to Mesopotamia, which is well-known for its use of cuneiform, a logo-syllabic writing system. Cuneiform consisted of wedge-shaped marks made on clay tablets, and it combined both logographic and syllabic aspects, meaning it used symbols to represent whole words (logos) as well as sounds (syllables). This script was developed by the Sumerians around 3200 BCE and later adapted by other cultures within the Mesopotamian region, such as the Akkadians and Babylonians.

In contrast, ancient Egypt employed hieroglyphs, which included logograms and phonetic elements but did not primarily function as a combined logo-syllabic system like cuneiform. The Indus Valley civilization had a form of writing that remains undeciphered and is not categorized specifically as logo-syllabic in the same established way as cuneiform. Ancient Greece is recognized for its innovated use of alphabetic writing, which differs significantly from the logo-syllabic systems that predated it, marking a shift towards phonetic representation. Thus, Mesopotamia stands out for its significant contributions to the development of logo-syllabic writing.