suffix is to affix as dialect is to language. Option four is correct.
An affix is a morpheme that is attached to a word stem to form a new word or word form.
A suffix is defined as a morpheme added at the end of a word to form a derivative.
A dialect is a particular form of a language which is peculiar to a specific region or social group.
And a language is a system of communication used by a particular country or community. Language is the method of human communication, either spoken or written, consisting of the use of words in a structured and conventional way.