Layers of mud made mostly of tiny shells and calcite crystals form the soft rock chalk. What type of rock results. Is the answer igneous rock

I'm pretty sure its sedimentary rocks

The answer to this question is sedimentary rocks

No.

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or here.

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sedimentary

No, the answer is not igneous rock. The rock that results from layers of mud made mostly of tiny shells and calcite crystals is called sedimentary rock, specifically chalk. Sedimentary rocks are formed through the accumulation of sediments, which can include materials such as mud, sand, or organic remains. In the case of chalk, it is dominantly composed of the microscopic remains of marine plankton called coccolithophores. Over time, these remains are compacted and cemented together to form the soft rock known as chalk.