Answer:-Most of the Arabian Peninsula is harsh hot desert, except for the cooler areas along the southern coast, and the western mountain regions. Here there are few lakes or permanent rivers. Most of the area is unsuited for agriculture, and in ancient times people lived at an oasis or in one of the small commercial centers.
The Bedouins found the answer to their problems in a four legged animal that carry great cargo, walk for miles and travel for days without refuelling - the camel. The Arabian camel or dromedary is the ultimate desert transport and has been a fixture in the desert since time immemorial.
Archaeologists have drawn attention to the value of material culture in documenting Byzantine and early Islamic trade networks. The Red Sea, for instance, has emerged as an important corridor for long-distance trade between the Mediterranean and the Indian Ocean. The inhabitants of Nabataean cities such as Petra (Jordan) and Meda'in Saleh (Saudi Arabia) constructed extensive hydraulic systems of dams, canals, conduits, pipes, and cisterns to provide water for domestic consumption, gardens, and fields Nomads lived in tents and raised herds of sheep, goats, and camels. The animals provided milk, meat, wool, and leather. The camels also carried heavy loads. Nomads traveled with their herds across the desert in search of food and water for their animals.