Answer: first option
Explanation:
The volume of a regular pyramid can be calculated with the following fromula:
![V=(B*h)/(3)](https://img.qammunity.org/2020/formulas/mathematics/middle-school/12l6ce2q0v35tt48nsmx3xq2f2ohs1je3k.png)
Where B is the area of the base of the pyramid and h iis the height of the pyramid.
The base is a square, therefore, its area B is:
![B=side^2\\B=(2units)^2\\B=4units](https://img.qammunity.org/2020/formulas/mathematics/middle-school/pab37yz1s75dyetkzrhxmitqw6l8qeue52.png)
You know that the height is 3, therefore, you can substitute these values into the formula.
THerefore, the volume of the pyramid is:
![V=(4units^2*3units)/(3)](https://img.qammunity.org/2020/formulas/mathematics/middle-school/ger9qbnt7tlp4a23w0kj0ovc676n6739vu.png)
![V=4units^3](https://img.qammunity.org/2020/formulas/mathematics/middle-school/53h4kx2tfuqpjmoxan03ezmcc0o234s8xq.png)