Low food/water, bad weather, and sorry I don't know the last one
I believe it would be A) erosion of topsoil.
I hope this helps :)
<span>The Kingdom of Italy was a state founded in 1861 when King Victor Emmanuel II of Sardinia was proclaimed King of Italy.</span>
River transport is very important because it had rear accedents cases as compered to road transport systerm, which counts almost 5 death per day. in addition to that, it was very cheap though it is slow
A Mercator...............
