How did this app change following the treaty of washington in 1846?

Reference to a 1946 Washington Treaty cannot be found. Perhaps you are referring to the Oregon Treaty, which was signed in Washington, D.C. on June 15, 1846. The Treaty of Oregan ended the boundary dispute concerning the Oregon Country, which had been occupied by Britain and US since the Treaty of 1818.

silk

indigo  

rice

all the other answers are wrong

increase in population