1. When describing a person's face as round, the appropriate adjective to use is "round," not "circle."
2. "Circle" is a noun that refers to a shape that is circular or a verb that means to move around a central point.
3. In this specific sentence, "round" is the better choice as an adjective because it directly describes the shape of the face.
4. Therefore, the correct English expression should be: "She has a round face."
