The document that's created by a society to define and organize its government is called a social contract and the constitution. In both, you define how the government looks like and what the government will do in order to ensure the society to function normally.
I believe this is D! Hope it helps you in any way.
Hunger led to people wanting to begin agriculture so they could make their own food. Some effects could be population booms after people stopped living the nomadic lifestyle, increase and creation of jobs with the farming, and agriculture established small towns and even cities. Hope this helps.
