How did the environment of arabia serve as a form of protection during much of the region's history? a. its fertile oases enabled farmers to grow enough food for themselves and for sale. b. its extreme heat and arid conditions kept invaders from attacking settlements. c. its landlocked location prevented traders from bringing in foreign goods. d. its mountainous regions kept farmers from mesopotamia from moving in

1of the following choices, which one best describes one way that christianity came to east africa? a. christians traveled in caravans through the sahara desert and introduced the people of mali to a new religion. b. christian traders from the mediterranean interacted with the people of axum. c. christian military from west africa traveled across the continent to bring their religion to the people of east africa. d. christian rulers from asia traveled to east africa to bring their religion to the people. 2 which trade item from outside the region did west africans need most? a. gold b. camels c. salt d. iron