Crowded and unhealthy conditions
Umm i think C correct me if wrong
<em>I believe it is the Factory System</em>
<u>Answer:</u>
"All are" associated with the Olmec civilization.
<u>Explanation:</u>
The "Olmec civilization" or "the Rubber person" in Aztec language, is understood as major Meso-American civilization. Colossal heads are considered as their basic art form. They resided in the tropical lowlands of south-central Mexico but at present called as states of Veracruz and Tabasco therefore they relate with Andes mountains.
This highly productive climate promoted a densely concentrated population, which in turn sparked the emergence of an elite class. They requested the symbolic and sophisticated luxury objects that characterize Olmec culture to be made. This suggest that early Olmec elites had access to long distance trade network in Meso-america.
The standard of living is improved through something called "comparative advantages", which means that, relative to the nations' total output and ability to make other things, each nation produces something that they're better at making than the other. When the nations trade, they are able to use these comparative advantages to create a more efficient, productive economy.
Even if one nation is wealthier or better off than the other, this principle means that both countries can still become better off through trade.