Answer:
They have been key stops along arabia's overland trade routes.
Explanation:
The Arabian Peninsula is a highly desert region, which means that it is difficult to live due to the difficulty of access to water and food.
However, there are people who live and work in the Arabian desert: the Bedouins.
These people, while crossing the Peninsula from one side to the other, find themselves in oases to supply their water reserves, to feed their families, clients and animals, such as the camel. In this case, the oases became important stops on Arabian land trade routes.
