are low ridges, typically made of coral, that rise to or near the ocean's surface.
Atolls
Islands
Archipelagos
Reefs

Brand c i think that should be it

The war began as a fight between mayans and the landowners of the country. the main causes of the guatemalan civil war was started by the greed of the united fruit company, the fear of communism, and the racism toward the  mayan  people.