Answer: first option.
Explanation:
The formula you must use to calculate the volume of the figure shown is the following:
![V=(BH)/(3)](https://img.qammunity.org/2020/formulas/mathematics/high-school/eqmc6n0ued8tor6lttj9u0m10q6or62l6y.png)
Where B is the area of the base and H is the height.
Assuming that the base of the pyramid is a square, you have that B is:
![B=(10units)^2=100units^2](https://img.qammunity.org/2020/formulas/mathematics/high-school/kpoipjs38h7nlly2ea1n7vhxxluq3qjklx.png)
Substitute values into the formula, Then you obtain:
![V=((100units^2)(12units))/(3)=400units^3](https://img.qammunity.org/2020/formulas/mathematics/high-school/mubwyfi169pb3iakw5shi7pu7dkbuavfvc.png)