After the Snopocalypse! Where were we?

So we missed more than a week from school, and you don't remember anything we covered up to this point! It's alright, I understand. Here are some of the basic themes we discussed (and if we discussed it, you're responsible for it.):
1.) Civilization began when farming began. Here is the sequence of how it began.
a.) Caveman looks for food as a hunter-gatherer
b.) Caveman wishes food was closer for time and safety reasons
c.) Caveman notices that some seeds grow into edible plants when dropped on ground
d.) Caveman begins to farm plants and domesticates animals
e.) Caveman is now a farmer, no longer a hunter-gatherer.
f.) Farmer becomes good at farming, is able to farm more food that ne needs. This is called a surplus.
g.) Surplus means that not everybody needs to farm. People can do other things to benefit the group -this is called job specialization.
h.) Different jobs leads to religion, art, government, writing, public works, government, and cities. This is civilization.

2.) The 4 River Civilizations
a.) Mesopotamia between the Tigris and Euphrates Rivers in present-day Iraq.
b.) the Nile River Valley in Egypt
c.) The Indus River Valley in present day Pakistan/ India
d.) The Yellow River Valley in China

River were important in farming as well as trade, so this led to river valley civilizations!