Answer:
Declaration of war
Explanation:
If the trade is limited to punish a nation, then it is likely an act of war.
I.E. America's cut in oil trade with Japan during WW2 because Japan allied with Germany, which led to Japan attacking America out of desperation/anger
Ontario is the modern – day Upper Canada. Upper Canada was
established by the Kingdom of Great Britain and included in the British Canada.
This was established for the purpose of governing central lands of North
America owned by the British, and accommodating American refugees after the
American revolution.
I cant see it you should post a diff pic
