Task: Class Definition Understanding (ontology: Human_Society/EmotionOntology)

Which of the following definitions best describes 'proboscis extension reflex'?

A. Any process that results in a change in the behaviour of an organism as a result of a chemical pain stimulus.
B. The extension, through direct muscle actions, of the proboscis (the trunk-like extension of the mouthparts on the adult external head) in response to a sugar stimulus.
C. the concept (olfactory perception) is a mental process which is
a) produced by a causal process involving xenobiotic molecules from a part of the environment of the subject binding with specialized sensory cells in the nasal cavity, and
b) is experienced by the subject as being so caused, and
c) in which the relevant part of the environment is thereby represented to the subject
D. The behavior of an organism in response to an odor.

Answer: The extension, through direct muscle actions, of the proboscis (the trunk-like extension of the mouthparts on the adult external head) in response to a sugar stimulus.