Which rock is used for manufacturing of pencil

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Graphite is used for manufacturing of pencil.p

Graphite

Explanation:

Pencils have cores made from powdered graphite (not lead) fired with clay, which varies in hardness. The type of graphite used in pencils is relatively soft and malleable, a little like lead, and was mistakenly thought to be a form of lead when first discovered.

answer; seasons change because earth tilts on its axis; and the angle of the tilt causes the northern and southern hemisphere to trade places throughout the year;