objective tone refers to an impersonal style of writing which gives us information about something but doesn't include information about the writer.

- Objective tone.

Explanation:

The tone is demonstrated as the author's attitude or approach towards a particular subject matter that is reflected through the word-choice(diction), language, and style used by the author. It provides the readers with a perspective to look at the text and evoke feelings as intended by the author.

As per the question, 'objective tone' is elucidated as the 'impersonal style of writing adopted by the author in which he/she presents the information factually and even-handedly without including his/her personal thoughts or opinions.' Such a tone involves factual claims supported by sufficient evidence that establishes the credibility of the author as well as the claim.