Explain why the united states is a republic

The United States Constitution, ratified in 1789, established a fairly strong federal republic to replace the relatively weak confederation with the Articles of Confederation and Permanent Union ratified in 1781, following the first attempt at a national government.

Explanation:

what are the choices? the multiple choices?

i will answer in the comments after the choices have been said.

this headline suggests that midterm congressional   elections are at the corner and trump administration wants to activate his base by vowing to clamp down on immigrants and immigration as trump had said during his election campaign around two years ago. when a baby is born in usa, the baby becomes citizen of usa for 85 years and trump wants to end this rule of birthright citizenship to control illegal immigration and this what he said in an interview""we’re the only country in the world where a person comes in and has a baby, and the baby is essentially a citizen of the united states for 85 years, with all of those benefits,” "