Final answer:
Access to water and artificial selection were crucial for early agriculture to expand and develop reliable food sources.
Explanation:
Access to water was a critical factor early people controlled for agriculture to expand. By directing water flow to irrigate crops, they were able to enhance crop yields and establish settlements.
Additionally, they engaged in artificial selection of domesticates to improve traits and domesticated crops and animals for a reliable food supply.
The availability and control of fresh water and the domestication of crops and animals were key advancements in the transition from hunter-gatherer societies to agricultural economies.
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