Allowed cities to grow in the tenth and eleventh centuries?
The correct answer is Option B. Increased food production.
What is increasing food production?
Farmers use better inputs such as synthetic fertilizers, improved varieties, and crop protection products and adopt better management techniques such as crop rotation to protect soil and irrigation to improve water use. And strengthened production.
Population growth requires increased food production. Food provides nutrients. Food is needed by all living things for their maintenance and survival.
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