Which individuals and/or what government groups are included in the executive branch of the united states?

If we are talking about executive branch, Then we are talking about the president himself. The President is both the head of state and head of government of the United States.

Executive Branch: President. 
Legislative Branch: Senate & House of Representatives. 
Judicial Branch: Nine Justices or The Supreme Court. 

The answer is eastern europe

To solve their problems, mesopotamians used irrigation, a way of supplying water to an area of land. to irrigate their land, they dug out large storafe basins to hold water supplies these ditches brought water to the feilds. to protect their feilds from flooding, farmers built up the banks of the tigris and euphrates.hope ths !