What important resources did early people need to create a food surplus

Most early civilizations developed in river valleys because they had a way to water there crops or plants, and give water to there animals. They also needed the water to drink and keep the soil fertile.

Explanation:

answer; /// i believe the correct answer is flash your high beams at them.or tap your horn;

answer; i believe the correct answer is customer,manufacturer, service provider,general public ; quality is primarily the responsibility of all all employees in the organization.