What is the difference between a barrier reef and an atoll?
a) Barrier reefs surround an inactive volcano emerging above sea level, while atolls surround the previous location of a submerged volcano.
b) Atolls surround an inactive volcano emerging above sea level, while barrier reefs surround the previous location of a submerged volcano.
c) Barrier reefs surround an active volcano emerging above sea level, while atolls surround the previous location of a submerged volcano.
d) Atolls surround an active volcano emerging above sea level, while barrier reefs surround the previous location of a submerged volcano.
a) Barrier reefs surround an inactive volcano emerging above sea level, while atolls surround the previous location of a submerged volcano.
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________________ humidity is expressed as a percentage
Fill in the blank(s) with correct word