Question

At which point in the writing process is it best to determine the voice and tone of your writing

Answer 1

To convince an audience in a formal presentation
Prewriting.
After refining your thesis and before starting a draft artistic heartened

Hope these help :)

Answer 2

Prewriting

Step-by-step explanation:

Determining the voice and tone that your writing will have is one of the most important steps that you need to follow when preparing to write your essay. The voice and tone of your writing will depend, to a great extent, on your topic, your attitude toward the subject matter and the audience you will address. All of these needs to be established in the prewriting stage.