Answer:
One aspect of early civilizations: Paleolithic Age
1. Paleolithic people survived by hunting and gathering.
Nowadays, we just go to a store and buy groceries.
2. Paleolithic people used sticks, stones, and tree branches as tools.
Today, we use hammers, screwdrivers, and ladders.
3. Back then, paleolithic people used fire to make themselves warm.
Now, we use thermostats.