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

Which of the following definitions best describes 'Grain color observation'?

A. Visual assessment of the percentage of plants in a plot showing symptoms of a specific disease.
B. Visual assessment of the color of the grain.
C. Estimate the date the flag leaf has fully emerged using keys and/or charts.
D. Visual assessement of the percentage of living plants in a plot.

Answer: Visual assessment of the color of the grain.