Assertion: group's unit | /r/HasProperty | the individual
Facets:
Source sentences:
text: The speed of the faster gazelle could be caused by a single gene, be polygenic, or be fully environmentally determined, but the unit of selection in this case is the individual since speed is a property of each individual gazelle.
text: For instance, if you are comparing the children in two classrooms on achievement test scores, the unit is the individual child because you have a score for each child.