Answer:
The U.S. Constitution is full of checks and balances of the three branches of government. The best example of checks and balances is that the president can veto any bill passed by Congress, but a two-thirds vote in Congress can override the veto. Congress has the power to set and collect any taxes or duties.
Explanation:
Depends on which countries.
In general, the trans-Atlantic slave trade greatly benefited European plantation owners in the West Indies since they were able to receive a practically limitless amount of free labor from Africa, which increased exports to Europe.