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
hope this helps<span />
Answer:
more than 100000
Explanation:
I guess so cause In each plant there should be 1000 so if we calculate the whole and each states continents it should maybe be 10000 I am not sure about it I just guessed it
-4x^2-4xy+6y^2 hope this helps
Hmm it has to be a ecothermal interalodge