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

Which of the following definitions best describes 'Root depth'?

A. The number of seeds per plant.
B. The plant rooting depth.
C. The pod biomass per sample or area unit at physiological maturity (R9) stage.
D. Plants ability to thrive, adapt, and produce desired outcomes in a given environment or context.

Answer: The plant rooting depth.