Answer:
A. reorganization of the state government
Explanation:
The population growth deals with the increase in the number of individuals living a given place. It is usually dependent on factors such as the level of migration, Job opportunities and environment.
Reorganization of the state government is least possible cause of population growth.Companies moving headquarters here,development of transportation systems, agriculture becoming more mechanized are reasons why people may decide to migrate.
It increased their population sizes, since farming could feed more people than hunting and gathering (the method used before the Neolithic Era).
the answer to 6 I believe is jury I looked it up