Under triangular trade, what did the english colonies mainly export to britain?

The goods that where brought into England from the colonies included raw materials from natural resources found in the New World such as timber, fur, iron, fish, whale oil, sugar, tobacco, rice and cotton. Rum was also one of the few 'finished goods' that were sent to England.

Explanation:

Triangular trade or triangle trade is a historical term indicating trade among three regions. Triangular trade arises when a particular nations exports are not required in the country from where most of its imports comes from. In such a situation, a third country will come into play in order to create a balance in trade.

i think it was   tsar alexander ii

the answer to your question is a. the salt plains

in 1811, he led an expedition, known as the george c. sibley expedition, to improve relations with the pawnee and kansa tribes, and also to locate the rumored jefferson's salt mountain