After the Persian War, what did Sparta, Athens, and other Greek communities collect to
ward off future external attacks?

They collected resources for building walls.

Explanation:

Building walls would help keep intruders out.

the culture of the americas was influenced by the language, food, and music of africa.

explanation:

your welcome : )

the answer is: must pay taxes on profits

since it is considered as a part of your income, profits from investments is eligible for tax payment.

the tax from your investment could be influenced by how long you decided to sell it. united states promotes keeping your investment for long term period. so, the tax rate for investments that you sell in less than one year is typically higher compared to investments that you sell in more than one year period.