What are the basic features of Protozoa?

Explanation

### Step-by-Step Solution:

1. **Definition and Classification**: Protozoa are single-celled organisms, classified as eukaryotes (not prokaryotes). They are often referred to as "animal-like" protists due to their motility and heterotrophic mode of nutrition.

2. **Cell Structure**: Protozoa are unicellular, meaning they consist of only one cell. Their cells are generally small, and they can sometimes form colonies, although they primarily exist as individual cells.

3. **Habitat**: Protozoa predominantly inhabit aquatic environments. They are commonly found in various water bodies such as ponds, rivers, and lakes, where they thrive in moist or watery conditions.

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