Answer the following question given this paragraph: 

Algae are like plants mainly because they contain chloroplasts. This allows them to make food by photosynthesis. Algae are important producers in water-based ecosystems such as the ocean. On the other hand, algae lack other plant structures. For example, they don’t have roots, stems, or leaves. Also unlike plants, some algae can move. They may move with pseudopods or flagella.


Q: Algae are like plants mainly because they contain what?

 Choices:

- organelles

- cells

- cell wall

- chloroplasts

A:
chloroplasts
