Which factor made the most difference in how agriculture affected the economies of the colonies?
a. workforce
b. choice of crops
c. climate
d. access to ports

It was the "b. choice of crops" that made the most difference in how agriculture affected the economies of the colonies, since many kinds of crops would not grow well. 

On april 20, 1814, the dethroned emperor left france for the isle of  elba, where he was exiled under the terms of the treaty of fontainebleau.napoleon  would be allowed to ruleelba, which had 12,000 inhabitants. perhaps cruelly, the treaty allowed him to retain the title "emperor."