What archaeological evidence suggests that existence of trade among north american civilizations?

I believe the answer is: Presence of shell artifacts far from the sea

The presence of shell artifact indicates that there are people who bring the material from the sea and manually transport them to the regions that are from the sea. From this, we can infer that there is a trading relationship between these region even if we cannot find proof of the transaction in writing.

answer: a

explanation:  

stocks and bonds are the two main classes of assets investors use in their portfolios. stocks offer an ownership stake in a company, while bonds are akin to loans made to a company (a corporate bond) or other organization (like the u.s. treasury). in general, stocks are considered riskier and more volatile than bonds.

savings accounts are just money in a bank- they are insured by the fdic for up to 250,000.   very little risk

the average mutual fund holds hundreds of different securities, which means mutual fund shareholders gain important diversification at a low price. which means if one stock or bond drops it will have very little affect on the mutual fund - again very little risk