The correct answers among all the other choices are 2. desert terrain, 3. dry climate, and 5. petroleum reserves. <span>The countries of the Arabian Peninsula have these things in common. </span>Thank you for posting your question. I hope that this answer helped you. Let me know if you need more help.
Answer:Geographic featured that acted as norther borders of the Roman Empire at its height were: Rhine River, Danube River, Carpathian Mountains, and the Black Sea.