How did the environment of Arabia serve as a form of protection during much of the region's history?

Question

Being landlocked helped prevent traders from entering for trading purposes.
The mountainous terrain kept farmers from being able to grow crops.
The oases provided a fertile environment for farming.
The extreme heat and dry conditions kept invaders from attacking the area.

which answer is correct?

Answer 1

The most appropriate answer to how the environment of Arabia served as a form of protection during much of the region's history is:

The extreme heat and dry conditions kept invaders from attacking the area.

The harsh climate, characterized by extreme heat and aridity, made it difficult for large armies to sustain themselves, thus providing a natural defense for the region. In contrast, the other options do not accurately reflect how the environment served as a protective factor in Arabian history.