There was no unified state that could grow all parts of life equally so they had to depend on trade in order to get goods that they needed from each other since they couldn't develop all parts of production or manufacture. Ones would for example have a developed pottery industry while the others would have mastered making Olive oil so they would trade in order to get what they needed because they couldn't make it on their own.
Answer:
a. Cape Town, South Africa
Explanation:
Hope this helps
Answer: <u><em>Fast mapping</em></u>
Barter trade good for others goods
Tropical climate receives the most solar energy
