Final answer:
Egypt and Mesopotamia were the first countries to change during the agricultural revolution, transitioning from hunting and gathering to settled agriculture.
Step-by-step explanation:
The first countries to change during the agricultural revolution were Egypt and Mesopotamia. These regions, also known as the Fertile Crescent, were the first to transition from hunting and gathering to settled agriculture. They developed farming practices and began cultivating crops, leading to the growth of civilizations in these areas.