BRAINLIST AND 20 POINTS Which of the following best describes the location of the first river valley civilizations? (4 points)

Civilizations developed in locations ideal for trade with natural defenses to prevent attack.
Civilizations developed in remote areas so that they did not have to spend tax money on defense walls.
Civilizations developed in areas well suited for agriculture but relied on trade for everything else.
Civilizations developed in areas ideal for trade but low in natural resources and defenses.

Civilizations developed in areas well suited for agriculture but relied on trade for everything else.

Explanation:

Examples of early river valley civilizations include the Indus Valley Civilization, Ancient Egypt (on the Nile), Mesopotamia (along the Tigris and Euphrates Rivers), and Chinese civilization along the Yellow River. The Indus River's source is in the Himalayan mountain range on the Tibetan Plateau near Lake Mansarovar

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: