Answer:
A.it prevent some UV rays
A reef than surrounds a volcanic island is an : Atoll
Atoll usually takes shapes in a form of ring that surround the areas of volcanic island that consist of corals. It usually only exist in warm waters, so volcanic islands will provide perfect environment for the corals
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Answer:
They are fighting a civil war against the FARC. They are a Marxist-Leninist group, and are Far-Left. The FARC formed in 1964, and has waged a Guerilla war in the jungles for decades. There are peace negotiations ongoing, but many dissidents are still fighting.