I don't see any options but I do have something that might help. Try looking up the definition and meaning of the religion of Islam. If you know what some of the words mean, that will single them out. Use process of elimination.
Cattle drives in the western United States largely ended in the late 1800s due primarily to a combination of barbed-wire fences and the new convenience of the railroad.
Answer:
Europeans traded in slaves because this was a free source of labor. They did not need to do the strenuous work by making their slaves do it for them, so it was on a high demand
Its really up to you...But a central government is when the government is controlling to unitary state while a strong government is when a federal/national government that has primacy the states/countries are primarily set up to mange the rules.
Make sense? if i did i am happy to help
if i didn't..Im sorry thats the best i can do