Which of the following was the most important development that caused people to shift from hunter-gather societies to agricultural settlements more than 5,000 years ago?
a. the growth of organized religion
b. the use of flood plains and irrigation
c. the industrialization and mechanization of farming
d. a change in climate that made foraging impractical

The use of the flood plains and irrigation was the most important development that caused people to shift from hunter gather societies to agricultural settlements more than 5000 years ago. The correct option among all the options that are given in the question is option "b". The fertile riverbeds helped in irrigation and so people settled besides the riverbeds.

The common sense pamphlet i think