Which early native american society built cliff dwellings and which built mounds?

Anasazi

They built their dwellings around mounds in order to make it easier to see the enemy coming from any direction. Such constructions also aimed to slow down an enemy attack  by making it hard to attack given that they had to march uphill.

it provided for selection of government employees through competitive examinations. it also made it unlawful to fire or demote covered employees for political reasons or to require them to give political service or payment, and it set up a civil service commission to enforce the law.

explanation:

donald carl johanson (born june 28, 1943) is an american paleoanthropologist. he is known for discovering – with yves coppens and maurice taieb – the fossil of a female hominin australopithecine known as "lucy" in the afar triangle region of hadar, ethiopia.

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i googled "who was kolson johanson" and this is the answer i found.

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