Task: Property Constraint Reasoning (ontology: Earth_Environment/EnvironmentOntology)

The property 'biomechanically related to' applies to instances of 'anatomical structure', and 'anatomical system' is a subclass of 'anatomical structure'. Which class can appear as the value of 'biomechanically related to' for instances of 'anatomical system'?

A. momentum transfer process
B. anatomical structure
C. vibration process
D. refractory astrogeological material

Answer: anatomical structure