Protists obtain food as

Options

A. photosynthesisers, symbionts and holotrophs
B. photosynthesisers
C. chemosyntesisers
D. holotrophs

Explanation

### Step-by-Step Solution:

1. **Understanding Protists**:
- Protists are a diverse group of organisms that can exhibit different modes of nutrition. They can be classified based on how they obtain their food.

2. **Modes of Nutrition**:
- There are two main types of nutrition in protists:
- **Autotrophic Nutrition**: Organisms that produce their own food.
- **Heterotrophic Nutrition**: Organisms that obtain food by consuming other organisms.

3. **Types of Autotrophic Nutrition**:
- **Photosynthesizers**: These protists, like Euglena, contain chlorophyll and can produce their own food using sunlight.
- **Chemosynthesizers**: These organisms obtain energy by oxidizing inorganic substances, but this is less common in protists.

4. **Types of Heterotrophic Nutrition**:
- **Holotrophs**: These protists ingest whole organisms for food. They are considered heterotrophs because they rely on other organisms for their nutrition.
- **Symbionts**: Some protists form symbiotic relationships, where both the protist and its host benefit from the interaction (e.g., Trichonympha helps digest cellulose in the guts of termites).

5. **Conclusion**:
- Since protists can be both autotrophic (like photosynthesizers) and heterotrophic (like holotrophs and symbionts), the best answer to the question "Protists obtain food as" is that they can be photosynthesizers, symbionts, and holotrophs.

### Final Answer:
Protists obtain food as **photosynthesizers, symbionts, and holotrophs**.

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