How did people in the early tehuacan valley live? what did they have for food and how did they get it?

Early Tehuacan Valley people were hunter-gatherers who first domesticated maize.

Explanation:

The Tehuacan Valley is an arid plateau located in southeast Puebla, a state located in central Mexico. The Tehuacan Valley is renowned for being an extremely dry region, where rain is scarce and access to fresh water is difficult. Despite that, the Tehuacan Valley has been continously inhabited for millennia, with the first nomad hunter-gatherers arriving in the area some 20,000 years ago. According to several findings, including those in a cave known as the Maize Cave, it was here were maize was first domesticated, some 7,000 years ago. This led to the Tehuacan Valley being the site of some of the first permanent settlements in Mesoamerica. Starting around 2000 BCE, the valley inhabitants devised and built a series of canals and dams to collect the much needed water for their maize crops. Because of this history, the Tehuacan Valley is also known as the "Cradle of Maize" worldwide.

formulating the initial idea for the policy

answer is c.