Arrange the following events in the order in which they happened.

the umayyad army crossed the strait
of gibraltar and conquered spain.

muhammad unified most of the arabian
peninsula into a single islamic state.

the europeans attacked the muslim empire
as part of the crusades.

islamic forces conquered mesopotamia by
defeating the byzantine people.

What would lead a historian to consider two events to have a relationship of correlation rather than causation?

2points which option best completes the diagram? humanitarian aid as a tool of foreign policy the united states provides humanitarian aid to rebuild after an earthquake. the country supports u.s. interests. o a. more educated citizens are more likely to create a democratic government o b. the citizens and government have a positive attitude toward the united states. o c. more prosperous citizens have money to spend. o d. the country's government discovers a new natural resource.

Overpopulation puts severe stress on the environment because .