Typically there are a variety of moral properties which could be associated with, and thus supervene on, the same nonmoral action. Thus killing an animal might be for the purposes of food, or ritual, or aggression, etc., and each carries a different moral weight though the act of killing is the same. See Nancey Murphy, "Supervenience and the Nonreducibility of Ethics to Biology," in Evolutionary and Molecular Biology: Scientific Perspectives on Divine Action, ed. Robert John Russell, William R. Stoeger, S. J and Francisco J. Ayala (Vatican City State; Berkeley, California: Vatican Observatory Publications; Center for Theology and the Natural Sciences, 1998). and Murphy, "Supervenience and the Downward Efficacy.".