What does the tone of a speech tell the reader?
a. the way the speaker feels about the topic.
b. the name of the speaker.
c. the factual evidence used by the speaker.
d. the opening statement of the speaker.

A) the way the speaker feels about the topic.

Explanation: The tone of a text or sentence is the author's or speaker's attitude towards the audience, the subject or even the characters of the text. There are many different kinds of tones, like: positive, negative, objective, sad, angry, etc. From the given options, the one that represents what the tone of a speech tells the reader, is the corresponding to option A: the way the speakers feels about the topic.

your answer is c) experiments with water vapor showed that elements combine in specific proportions.