selection vs variety

selection and variety both are nouns.

Word	Noun	Adjective	Verb	Adverb
selection	Yes	No	No	No
variety	Yes	No	No	No

As nouns, variety is a hypernym of selection; that is, variety is a word with a broader meaning than selection:

selection (noun)	variety (noun)
the act of choosing or selecting	noticeable heterogeneity
the person or thing chosen or selected	a difference that is usually pleasant
a passage selected from a larger work	a category of things distinguished by some common characteristic or quality
an assortment of things from which a choice can be made	a show consisting of a series of short unrelated performances
a natural process resulting in the evolution of organisms best adapted to the environment	(biology) a taxonomic category consisting of members of a species that differ from others of the same species in minor but heritable characteristics
	a collection containing a variety of sorts of things