"Empty Quartier" is the English translatation for the name of one of the deserts on the Arabian Peninsula. The Arabic name for this desert it d. Rub al-Khali
- and this is the correct answer. It's the second biggest desert on this Peninsula. It's in the South of the Peninsula on the border between Saudi Arabia, Yemen and Oman.
When you see water at the bottom of the hole, that is a sign you've found Water Table
Water table refer to an area in the ground that are filled with water. Back in the day, before the modern watering system, people get their water supply by digging the ground until they fount water table and build a well around it
Limestone would be your correct answer. Limestone is a VERY weak rock that is easily dug out by the elements. Hope this helps :)
