... a) various – Sorry, this is an adjective: you need a verb. b) variety – Sorry, this is a noun: you need a verb. c) vary – Well done, this is correct! d) variable – Sorry, this is a adjective: ... a) various – Sorry, this is an adjective: you need a noun. b) variety – Well done, this is correct! c) vary – Sorry, this is an verb: you need a noun. d) variable – Sorry, this is an adjective: ... variable – Sorry, this is an adjective: you need an adverb. b) invariably – Well done, this is correct! c) variations – Sorry, this is a noun: you need an adverb. d) invariable – Sorry, this is an...