Members of Protista are primarily-

Options

A. Parasites
B. terrestrial
C. Aquatic
D. Photosynthetic

Answer

To answer the question about the primary habitat of members of Protista, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Definition of Protista**:
- Protista is a kingdom that includes a diverse group of eukaryotic organisms, which are primarily unicellular (single-celled) but can also include some multicellular forms.

2. **Identify Characteristics of Protista**:
- Members of Protista are eukaryotic, meaning they have a defined nucleus and organelles. They can be autotrophic (photosynthetic) or heterotrophic (feeding on other organisms).

3. **Consider the Habitats of Protista**:
- Protista are predominantly found in aquatic environments. This includes freshwater (like ponds and lakes), marine (oceans), and brackish waters (where freshwater meets saltwater).

4. **Evaluate the Given Options**:
- **Parasite**: While some protists can be parasites, this is not their primary characteristic.
- **Terrestrial**: Protists are not primarily terrestrial; they thrive in water.
- **Aquatic**: This option aligns with the understanding that most protists are found in aquatic environments.
- **Photosynthetic**: While some protists are photosynthetic (like algae), not all are, so this is not a defining characteristic.

5. **Select the Correct Answer**:
- Based on the evaluation, the correct answer is **C: Aquatic**. This reflects the primary habitat where most members of Protista are found.

### Final Answer:
Members of Protista are primarily **Aquatic**.

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