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Question
Which one of the following ocean tides are caused by biological factors?
Options:
A .  Perigean tide
B .  Apogean tide
C .  Neap tide
D .  Red tide
Answer: Option D
Answer: (d)
Red tide is caused by algal blooms, these algal blooms are also known as harmful algal blooms and occur when colonies of algae grow out of control while producing toxic or harmful effects on people, fish, marine mammals and birds.
Nearly every summer along In Florida’s Gulf Coast, Red tide frequently occur during summer.

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