What is the primary tool a writer uses in establishing the voice of a written work?

A. word choice

B. structure

C. transitions

D. supporting details

The primary tool a writer uses in establishing the voice of a written work is the word choice. The correct option for the given question is option "A". Every writer has his own writing style and this style of writing identifies the writer. The writer firstly tries to experiment with different type of words, but ultimately the writer sticks to one style of writing which identifies him or her. This style of writing is dependent on the word choice of the writer.