Final answer:
Early Mesopotamian society primarily used natural resources by irrigating crops with river water. They exploited the Euphrates and Tigris rivers for irrigation, allowing for substantial crop growth and supporting societal development.
Step-by-step explanation:
In the development of early Mesopotamian society, the use of a natural resource can be best described by irrigating crops with river water. The Mesopotamians developed a method of irrigation for their agricultural areas using water from the Euphrates and Tigris rivers. This technique allowed for substantial crop growth, playing a pivotal role in supporting the growth and development of their civilization.
Learn more about Mesopotamian Irrigation