Maybe to decided whether something is safe or not.
C) a guide to use for studying
I am guessing your looking for...<span>The fur trade was important to both colonies.</span>
Slightly road built that invented by McAdam <span>makes the road slightly convex, and would make rainwater that fall on the road to be quickly drained.
This would prevent the water from damaging the road Foundations.
Even until today, McAdam's invention is considered as the most effective and economical method of road construction</span>
Irrigation was a Sumerian invention, which included major components like canals, gated ditches, levees, and gates. Its two purposes were to (1) to water the crops using w<span>ater carried from the Tigris and Euphrates Rivers to the fields where the crops were located, and (2) </span><span>to protect Mesopotamia, from the threat of flooding.</span>
