In the I can age farming was their main source of food and a lot of people bought food from farmers. Now people can just by already made food at grocery stores that don't always come from farms.
Answer: b
Explanation: Obsidian is a naturally occurring volcanic glass formed as an extrusive igneous rock
Answer:
The three criteria of the IAU for a full-sized planet are: It is in orbit around the Sun. It has sufficient mass to assume hydrostatic equilibrium (a nearly round shape). It has “cleared the neighborhood” around its orbit. ^v^
