The most accurate words to fill the spaces would be:
Sugar plantations were the backbone ( source ) of the economy.
In 1890, the US Congress passed the ( McKinley Tariff ), which removed tariffs on all foreign sugar imports.
Hope my answers have come to your help.
It would be "Jean-Jacques Rousseau" who believed that sovereign powers reside with the citizens and the government gets its authority from the consent of the <span>governed, since he was a major Enlightenment thinker. Paine also believed this, however. </span>
Answer:
I think it's chemicals sold to pharmaceutical developers... i don't know if it's right, though... i'm only in 8th grade, so it could be wrong, so wait until you get some more answers, and then double check each one. Hope it helps!