The reasons why groups of people leave a particular place are known as

Answer the use of flood plains and irrigation;

Historians are researchers of the past or people who understand the history of people. with this field, they must possess qualities such as being unbiased, patient, efficient reader, has a knack for logic and critical thinking and reasoning, disciplined, open-minded, resourceful, with good analytical ability, good reasoning skills and problem solving!

100% tortilla. it is the only possible answer