The Answer is second option (Tombouctou).
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.
The answer is D. Gravity.
Gravity attracts objects to the surface of the Earth. Take a falling brick, for example, the brick has more mass, therefore, there is more attraction between the brick and Gravity. The brick is a solid object and is heavier as well.
Hope this helps! :)
