Here's why:

* Protist: A general term for a diverse group of mostly single-celled eukaryotic organisms.

* Photoautotroph: An organism that uses light energy to synthesize its own food (like plants). They contain chlorophyll and perform photosynthesis.

Examples of photoautotrophic protists include:

* Algae: A large and diverse group that includes diatoms, dinoflagellates, and green algae.

* Euglena: A single-celled organism with both plant-like chloroplasts and animal-like flagella.