The source treats 'animal' as a component of humanity in the classical definition 'rational animal.' It does not by itself specify the entire human kind.
Nevertheless, 'animal' is an essential universal relative to humans because being a constituent of the essence is sufficient: the essential need not always express the whole definition.
Thus either the complete essence or a defining conceptual component counts as essential.
Opening interactive controls...
An essential universal as part of an essence
Essence, Quiddity, and Essential vs Accidental Universals
The source treats 'animal' as a component of humanity in the classical definition 'rational animal.' It does not by itself specify the entire human kind.
Nevertheless, 'animal' is an essential universal relative to humans because being a constituent of the essence is sufficient: the essential need not always express the whole definition.
Thus either the complete essence or a defining conceptual component counts as essential.