Question $4[7$ Marks$]$

$4\mathrm{.}1$ Given a setting where a dam must be built in a region with frequent earthquakes. Apply engineering principles that suggest key design elements to mitigate seismic risks.

$4$

$4\mathrm{.}2$ Create a plan for selecting materials to construct a dam in a remote area with limited resources. Include the following.

Consideration that guides your material choices

Ensuring Structural stability