Final answer:
The Amorites, a nomadic tribe, settled in Mesopotamia and replaced the Sumerians as rulers. While they brought their own language and culture, they also adopted many in Mesopotamian culture. The cities of Mari, Asshur, and Babylon were established by the Amorites.
Step-by-step explanation:
In the centuries after 2004 BCE, the migration of Amorites into Mesopotamia resulted in the gradual disappearance of Sumerian as a spoken language. People in the region came to speak Amorite, which belonged to the family of Semitic languages.
Nonetheless, scribes continued to preserve and write works in Sumerian and Akkadian cuneiform. Sumerian and Akkadian became the languages of religious rituals, hymns, and prayers, as well as classic literary works such as the Epic of Gilgamesh.
Consequently, the literary output of these earlier cultures was preserved and transmitted to the new settlers. When nomadic Amorite tribes settled in Mesopotamia, they eventually established new cities such as Mari, Asshur, and Babylon, and they adopted much of the culture they encountered. The ancient Sumerian cities of Larsa and Isin of this era also preserved these cultural traditions, even as they came under the rule of Amorite kings.