Hello. You did not show the excerpt to which the question refers. What prevents it from being answered accurately. However, I will try to help you in the best possible way.
In a text the "voice" refers to all the words, point of view, diction and tone and vocabulary used. The "voice" is defined by the speeches of the narrator and the characters.
The tone and mood are related to the perception that the author wishes to promote to the reader during the reading. In this case, the mood refers to the sensation that the story passes, while the tone refers to the positioning of the text in relation to a theme.
The meaning, in turn, refers to the importance, the sense and the interpretation that the reading of the text promotes.