Question

Red Tides in sea appears due to rapid multiplication of *
1..Diatoms
2. Gonyaulax
3. Euglena
4. Plasmodium​

Answer 1

Answer:

The upwelling of nutrients from the sea floor, often following massive storms, provides for the algae and triggers bloom events. ... These organisms undergo such rapid multiplication that they make the sea appear red. When the algae are present in high concentrations, the water may appear to be discolored or murky.

Explanation:

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Answer 2

The correct option is "2"

Red tides are a phenomenon of discoloration of sea surface. ... Certain species of phytoplankton, and dinoflagellates like Gonyaulax, are found in red tides and contain photosynthetic pigments that vary in color from brown to red. These organisms undergo such rapid multiplication that they make the sea appear red Gonyaulax belongs to red dinoflagellates and commonly causes red tides.

Hence the answer is Gonyaulax