Geography, 04.10.2021 18:30 davidgarcia522083

(3) (4)
4. The river valleys of the Tigris-Euphrates, the Nile, and the Indus
were centers of civilization because they
9
(1) had rich deposits of iron ore and coal
(2) were isolated from other cultural influences
(3) were easy to defend from invasion
(4) provided a means of transportation and irrigation

Answers: 1

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(3) (4)
4. The river valleys of the Tigris-Euphrates, the Nile, and the Indus
were cen...