Why were the people of the arabian peninsula primarily nomadic?

a. the threat of invasion prevented them from staying in one place for too long.

b. according to their religious beliefs, people should keep moving from place to place.

c. most of the land was dry, sandy, desert, making it difficult to settle down and farm.

d. easy access to the persian gulf and red sea encouraged movement.

C. Most of the land was dry, sandy, desert, making it difficult to settle down and farm

Explanation:

The Arabian Peninsula is one of the most inhospitable places for living on the planet. Almost all of it is dominated by desert. It is very hot and dry throughout all of the year. The soil is lacking, and the majority of the landscape is covered with sand and rocks, making it impossible to get involved in agriculture. This made the people to live a nomadic lifestyle, moving from place to place constantly in order to get to the needed resources in order to survive.

the answer to fill in the blank in this question would be the word resource, it is defined as the money, material or people (since human resource is a very valuable good) that a company or a person has at disposition (meaning they can use the resource as they see fit), to be able to complete a task or achieve a goal.