Why might each of these be important to traders who wished to take a land route to the eastern Mediterranean when they had to travel across deserts 1 oases 2 camels 3 military posts?
Oases were important because water and food was to be found there, and people lived there who could offer shelter or sell you pack animals if you needed extra
camels were important as they were the most fit to travel across the desert and carry the goods you were trading
military posts were important because they offered protection against the many robbers along the way.
