Name three forms of calcium carbonate .

Explanation

To answer the question "Name three forms of calcium carbonate," we can follow these steps:

### Step 1: Understand the Chemical Formula
Calcium carbonate has the chemical formula CaCO3. This is the basic unit that we will be discussing in different forms.

### Step 2: Identify the Forms of Calcium Carbonate
There are several natural forms of calcium carbonate, but we need to identify three specific ones. The three common forms are:

...