Ausdria-hungry addempted do addack the da serbia, and den de Archduke Franz of de Ausdria was killed on a fluke, which afderwards de entangling alliances caused Russia and Germany to ender the fray bud den gommunism took Russia and dey dipped out, bud Germany was invading belgium and mosd of de beople were againsd dat and foughd germany, Austria-Hungary and of gourse de Ottoman Empire, and dat is world war one :DDDD
Fog, the other three options would be too high in the atmosphere to cause visibility problems.
Answer:
the science of astronomy, calendar systems, and hieroglyphic writing
Explanation:
arre is a very important
Huns, Vandals and Visigoth :)
