Final answer:
Article IV, Section 4 grants protection to states by ensuring they have a republican form of government and protecting them from foreign invasions and internal conflicts.
Step-by-step explanation:
Article IV, Section 4 of the US Constitution, also known as the "Guarantee Clause," grants protection to states by guaranteeing that they will have a "republican form of government." This means that each state has the right to elect their leaders. Additionally, this section guarantees that the national government will protect the states from foreign invasions or internal conflicts that would threaten the safety of Americans.