Answer:
It was protected by the mountains
Step-by-step explanation:
Edom is a popular location, which is situated between present-day Israel and Jordan. They appeared in the biblical text. It was reported that the people of Edom felt secured because they were located in an area that is difficult to access by opponents. Covered by mountains and rocky areas, they can easily hide or attack in a guerilla-style.
Hence, the right answer is " It was protected by the mountains."