Trade/interactions between ancient civilizations

Trade between ancient civilizations was often very simple. One might have traded animal skins for produce or grains for a small animal. THis was known as bartering.

In ancient times, civilizations relied on nature for everything they needed. Everything was simple, but people had to work hard and labor for anything that they wanted.

d. it adversely affected american productivity

6 pounds is equivalent to 92 ounces.

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