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

The property 'attached to part of' applies to instances of 'anatomical structure', and 'ectoderm-derived structure' is a subclass of 'anatomical structure'. Which class can appear as the value of 'attached to part of' for instances of 'ectoderm-derived structure'?

A. algal production
B. precipitation process
C. well intervention
D. anatomical structure

Answer: anatomical structure