<u>Answer:</u>
<em>Scarcity of resources</em><em> happens when the resources are unable to meet the unlimited demands and needs.</em>
<u>Explanation:</u>
Marginal utilisation of resources it is a method in which resources are utilised such that it doesn't over exploit them. And use them mindfully do to avoid any kind of scarcity in future and optimal usage of resources in the present as well as future.
Alternatively these resources can be utilised by proper allocation of resources such that alternative products can be formed using the same amount of resources.
Yes. A country can expand its borders without committing genocide because through not only discussions can these issues be resolved, two different countries can reach agreements on how each of them want the best for their country. It may be beneficial for both or all parties for another country to expand its borders, without being at the expense of human lives.
The Roman legions, which were columns of roughly five-thousand men a piece, were greatly beneficial to the Romans because they were able to maneuver more freely around enemy forces, which were usually condensed into a single unit.
<span />
