Final answer:
The Ancestral Puebloan, or Anasazi, tribe constructed buildings made of adobe into rock ledges and steep mesas in southwest America. Examples of these cliff dwellings can be found in Mesa Verde National Park in Colorado, Pueblo Bonito in New Mexico, and Cliff Palace in Colorado.
Step-by-step explanation:
The native tribe that constructed buildings made of adobe into rock ledges and steep mesas in southwest America were the Ancestral Puebloan peoples, also known as the Anasazi.
These buildings, also referred to as cliff dwellings, were primarily built into the cliff faces of the Four Corners region of the United States, which encompasses the southwestern corner of Colorado, northwestern corner of New Mexico, northeastern corner of Arizona, and southeastern corner of Utah.
Some notable examples of these cliff dwellings include Mesa Verde National Park in southwestern Colorado, Pueblo Bonito in New Mexico, and Cliff Palace in Colorado.