Tone in literary nonfiction refers to <span>the overall presence of a personality behind the text.
This could be done through the right use of words and descriptions. Tone could establish the author's side that he wants to convey to his readers. I hope this answer helped you.
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I can provide you with a free copy of the book, if you'd like. Sadly, this cannot be answered directly.
<span>Ice floats because ice is less dense (lighter) that water, especially the denser oceanic waters. Though ice floats, most of the ice cube, ice berg, etc, remains beneath the surface with only a portion showing above the surface.</span>