Final answer:
Egypt is the ancient civilization that used hieroglyphics for communication, with this writing system being central to their culture and administration from around 3000 BCE until its decline.
Step-by-step explanation:
The ancient civilization that used hieroglyphics as a way to communicate was Egypt. The Egyptians developed this complex writing system around 3000 BCE, which included a combination of alphabetic signs, syllabic signs, word signs, and pictures of objects.
Hieroglyphic writing was known to be a sacred practice, and it was intricately tied to Egyptian culture and administration, used for recording tax, mercantile transactions, and sacred prayers within tombs, providing cultural continuity over millennia. However, the knowledge of how to read and write hieroglyphics was lost by the end of the fourth century CE and was only deciphered again in the 19th century with the discovery of the Rosetta Stone.