Making paper from wood do it becomes a caused of heating?

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To make paper from trees, the raw wood must first be turned into "pulp." Wood pulp is a watery “soup" of cellulose wood fibers, lignin, water, and the chemicals used during the pulping process. Wood can be turned to pulp in a couple of different ways.

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Usually, heat and chemicals are used to aid in this process. Due to the "brute force" nature of mechanical pulping, both whole and partial fibers are created. In addition, the lignin is not removed from the paper. ... Papers made from mechanical pulp, are also known as "groundwood" papers.

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i think   the answer is c hope i'm right