na-adjective, noun which may take the genitive case particle 'no', noun
a great variety of; diverse; wide-ranging
Emphasizes both numerous kinds and diversity. Used as a な-adjective, の-adjective, or noun. Common in formal and written contexts.
This shop has a great variety of products on display.
A wide range of opinions were expressed.
多種多様 is a common, neutral way to say 'various kinds', whereas 千差万別 is a more literary, emphatic yoji-jukugo stressing extreme diversity.
多種多様 is a four-character idiom emphasizing a wide variety of kinds, while 多様性 is the more abstract, academic noun for diversity.
多種多様 is a stronger, more emphatic four-character expression stressing great variety, whereas 種々 is simpler and more general.
A yojijukugo composed of 多種 (many kinds) and 多様 (diverse). The exact historical derivation is uncertain, but it follows a common pattern of combining two two-character compounds to form a four-character idiom.