Your answer would be trade. Hope this helps!
B. Trail of tears
From 1831-1850 Native Americans were forced, by the government, from their ancestral homelands in the Southeastern US to to designated areas in the Western plains. Many of the Native Americans died on the journey from starvation, disease and exposure. Some of the tribes forced to relocate were the Seminole, Cherokee, Chickasaw and Ponca.
They put in 4 new acts, or the intolerable acts.
One made the Townsend act stronger
One cut off trade from Boston
One was that people who broke the laws, were to be sent to England for a trial
One was they cut off all colonial meetings