Anser: B
Explanation: back in the day people where dependent on water sources that us where they got some of there food and it is also what they used to water crops and drink hopes this helps
Democratic city-states allowed citizens to vote
The most important sources of social changes are physical environment, technology, population, cultural innovation and social conflict. The statement is true.
<h3>What is social change?</h3>
Social changes refers to those changes that occurs in human being while interacting and making relationships which transforms the society and culture as a whole.
These changes benefits the society as a whole as technological development helps the future generations for example mobile phone helps social interactions and many more.
Thus social changes are important for future growth.
Learn more about changes here:
brainly.com/question/16971318
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