5. Explain how atolls are formed?

The central lagoons of atolls are formed by coral growth and volcanic activity.

Hope this helps

Explanation:

d.prevent the spread of communism outside of eastern europe.

worcester v. georgia, legal case in which the u.s. supreme court on march 3, 1832, held (5–1) that the states did not have the right to impose regulations on native american land. andrew jackson refused to enforce the ruling, the decision form the basis for most subsequent indian law in the united states.