Task: Class Definition Understanding (ontology: Earth_Environment/EnvironmentOntology)

Which of the following definitions best describes 'marine faunal bed'?

A. A marine faunal bed which is dominated by mussels of the Mytilus or Modiolus genera either 1) resting on the sediment surface, 2) partially embedded in the sediment, 3) attached to conspecifics (by using their byssal threads), or 4) attached to a piece of gravel in slightly gravelly fine sediments.
B. A marine bed which is covered by animals which have benthic habitats, including attached, clinging, sessile, infaunal, burrowing, laying, interstitial, and slow-moving animals, but not animals that have created substrate.
C. A bed of a marine, saline water body which is covered by one or more speices of seagrass typically belonging to the families Posidoniaceae, Zosteraceae, Hydrocharitaceae, or Cymodoceaceae.
D. A marine bed which lies below an ocean.

Answer: A marine bed which is covered by animals which have benthic habitats, including attached, clinging, sessile, infaunal, burrowing, laying, interstitial, and slow-moving animals, but not animals that have created substrate.