Task: Class Definition Understanding (ontology: Earth_Environment/EnvironmentOntology)

Which of the following definitions best describes 'face'?

A. A vasculature that is part of a iris [Automatically generated definition].
B. The subdivision of the face that includes the eye (eyeball plus adnexa such as eyelids) and the orbit of the skull and associated parts of the face such as the eyebrows, if present.
C. A bridge designed solely for pedestrians.
D. A subdivision of the head that has as parts the layers deep to the surface of the anterior surface, including the mouth, eyes, and nose (when present). In vertebrates, this includes the facial skeleton and structures superficial to the facial skeleton (cheeks, mouth, eyeballs, skin of the concept, etc).

Answer: A subdivision of the head that has as parts the layers deep to the surface of the anterior surface, including the mouth, eyes, and nose (when present). In vertebrates, this includes the facial skeleton and structures superficial to the facial skeleton (cheeks, mouth, eyeballs, skin of the concept, etc).