Which best describes how diction contributes to a writer’s style?
diction is the dialogue a writer uses to develop characters.
diction is the way that a writer varies sentence structure.
diction is the manner in which a writer arranges words and phrases.
diction is the language a writer chooses to express an idea.

Diction is the manner in which a writer arranges words and phrases.

Explanation:

It is so because when a person speaks Diction he arranges his words and phrases.

Diction is the manner in which a writer arranges words and phrases.

Explanation:

Diction refers to the choice and use of words and phrases, which involves variety of language, vocabulary, idioms, terminology and expressions. A writing style has to do with the author's individual way of expressing his or her thoughts, and it includes diction as well as abstract language and sentence structure.