Why did the founding fathers have to fight for their rights?

Which of the following was a similarity between classical mesoamerican and south american civilizations ?

Who had the idea that there should be 3 branches of government

Why is illegal immigration a controversial issuea. people think that the current laws on immigration address the issue well.b. there are far fewer illegal immigrants each year than naturalized citizens.c. americans disagree on weather immigration law should change to address it.d. most naturalized citizens first entered the united states as illegal immigrants.