Why were written laws needed as early societies became larger and more complex?

To establish and maintain a sense of uniform order amongst the people

Explanation:

So, as societies grew in both population and in land occupation, it became harder to regulate the civil obligations of being a "good citizen." The earliest written "code of law" is Code of Hammurabi, which established the "eye for an eye, tooth for a tooth" as a law to follow for a peaceful society. The use of an established set of law's helped to create a universal understanding of what was expected to be followed by all men throughout a large area ruled by one "king" which also helped to unify those city-states under one identity. His codes also laid out the punishment for breaking said law so there would be no confusion or room of interpretation on consequences of actions.

is there options? or is it random words?

explanation:

c) troops march forward in close formation against newer, more accurate weapons