I need help I don't understand

Which best explains why many american indian chiefdoms came to an end within a few years of hernando de soto’s arrival in georgia?

Which idea that emerged as a result of the protestant reformation is also reflected in modern democratic government? a. self - government b. religious tolerance c. humanism d. censorship

Which political principle is set forth in this quote from the declaration of independence? "that whenever any form of government becomes destructive of these ends, it is the right of the people to alter or to abolish it, and to institute new government "?