Which best describes the columbian exchange?
the movement of people from the old world to the new world
the goods columbus moved between the new world and old world
the trade of goods between the new world and old world
the inventions brought from the old world to the new world

the federal government of the united states was established by the constitution. us is a presidential republic. the president is head of state, head of government and of a two party legislative and electoral system. the supreme court balances the powers of the federal and the state government. yhe executive branch is headed by the oresident. there are two chambers of congress, the senate and the house of representatives. judicial power is exercised by the judicial branch (or judiciary), comprised of the supreme court and lower federal courts. the judiciary's function is to interpret the   constitution as well as the federal laws and regulations.

answer; health-related quality of life;

answer; protecting domestic national security; i believe this is correct,plz check first,good luck;