Red tide is caused by an organism which closely by a organism which structures ?

Options

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Answer

**Step-by-Step Solution:**

1. **Understanding Red Tide**: Red tide refers to a phenomenon caused by harmful algal blooms, which are rapid increases in the population of algae in water bodies. These blooms can produce toxins that are harmful to marine life and humans.

2. **Identifying the Organism**: The specific organism responsible for red tide is a type of dinoflagellate, notably *Gonyaulax*. This organism is known for its ability to produce toxins that can lead to harmful effects in aquatic environments.

3. **Analyzing the Options**: The question provides several options related to different organisms:
- **Option 1**: Structure of *Gonyaulax* (correct answer)
- **Option 2**: Structure of Euglena (not related to red tide)
- **Option 3**: Structure of Amoeba (not related to red tide)
- **Option 4**: Structure of Paramecium (not related to red tide)

4. **Conclusion**: After analyzing the options, it is clear that the organism responsible for red tide is *Gonyaulax*, which is a microscopic algae that produces toxins leading to the phenomenon.

**Final Answer**: The organism that causes red tide is *Gonyaulax*.

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