Question

It is used to make chalk a. Shale b. Slate c. Sandstone​

Answer 1

Answer:

c. stand stone

Explanation:

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Answer 2

Answer:

Chalk, soft, fine-grained, easily pulverized, white-to-grayish variety of limestone. Chalk is composed of the shells of such minute marine organisms as foraminifera, coccoliths, and rhabdoliths. The purest varieties contain up to 99 percent calcium carbonate in the form of the mineral calcite. so option; c is the answer!