Task: Class Definition Understanding (ontology: Food_Agriculture/Crop_Ontology)

Which of the following definitions best describes 'Legume fruit spine density'?

A. The shape of the spines on the surface of the legume fruit.
B. The color of a flower or group of flowers from a plant, expressed as a vector of float values on a color scale of choice.
C. The number of spines visible on the surface of the legume fruit per unit area of visible seed surface.
D. The ratio of the seed contour area to the bounding box area.

Answer: The number of spines visible on the surface of the legume fruit per unit area of visible seed surface.