What is the term that refers to one way humans can adapt land in a dry climate for farming

This excerpt from article il of the u. s. constitution describes which of thepresident's major functions?

Where do most people in arabia and iraq live? a. in the fertile crescent b. in the rub, al-khali c. in cities d. in and around mecca

In what ways are some local executive branches structured in a similar manner to state executive branches, and in what ways are some structured differently?