Because It is an eyewitness account of the atrocities committed at concentration camps written by a former prisoner who experienced them firsthand.
Answer:
Sellers are in a purely competitive market and see a perfectly elastic demand. They can sell any quantity of the product at the market price.
The Olmec civilization was located in Mesoamerica, in a region that is now occupied mainly by Mexico. They were a very early civilization that came to prominence around the same time as Mesoamerica was flourishing.