It reinforces the significance of a single word.
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You will usually find a period at the end of a paragraph ,or even a sentence.
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It definitely adds more meaning to the story than what was already there. I think it can definitely put you in a better place of understanding especially if you've had a loss like that. Knowing this makes me respect the book, and the writer them self more than I already did. Lovely book of I may say.
Family is a group of people related by blood or marriage e.g nuclear and extended family