why were the Arabs able to expand and conquer such large empire in so short amount of time?what factors facilitated this?

What is something current on the news happening? not anything about a fire

What do most climatologists see as a major cause of rising global temperatures? a. earth's closer proximity to the sun due to its gravitational pull b. greenhouse gases produced by burning fossil fuels c. rising ocean levels caused by melting polar ice sheets d. water pollution cause by industrial waste

Brainliestttme : ) describe the event: increase in islamic extremism in the middle east