Final answer:
Terracotta is the name of a hard, fired clay that is reddish-brown in color when unglazed and is used for architectural facings and ornaments, tile units, and pottery.
Step-by-step explanation:
The name of a hard, fired clay that is reddish-brown in color when unglazed and is used for architectural facings and ornaments, tile units, and pottery is terracotta.