Answer:
In 1917, Britain issued the “Balfour Declaration,” which declared its intent to establish a Jewish homeland in Palestine. Although protested by the Arab states, the Balfour Declaration was included in the British mandate over Palestine, which was authorized by the League of Nations in 1922.
Explanation:
Coining of money: FEDERAL GOVERNMENT
Fire and police protection: STATE GOVERNMENT
Schools: STATE GOVERNMENT
Army and Navy: FEDERAL GOVERNMENT
Treaties with other nations : FEDERAL GOVERNMENT
Highways and roads: STATE GOVERNMENT
Local courts: STATE GOVERNMENT
So, I'd say that Coining of Money, Army and Navy, Treaties with other Nations are most powerful.
This probably didn't help but I hope it did! :D
-LavenderVye
A because babies have emotion but don't know what they are