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

Which of the following definitions best describes 'pharyngeal pumping'?

A. An eating behavior process whereby detection of a dietary excess results in a decrease in intake of nutrients.
B. "Any homeostatic process in which an organism modulates its internal body temperature at different values with a regularity of approximately 24 hours." [GOC:dbh]
C. The contraction and relaxation movements of the pharyngeal muscle that mediate feeding in nematodes.
D. A process that begins with venom being forced into an organism by the bite or sting of another organism, and ends with the resultant modulation of signal transduction in the bitten organism.

Answer: The contraction and relaxation movements of the pharyngeal muscle that mediate feeding in nematodes.