variety vs selection

variety and selection both are nouns.

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

As nouns, selection is a hyponym of variety; that is, selection is a word with a more specific, narrower meaning than variety:

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