Answer:
Checks and balances, principle of government under which separate branches are empowered to prevent actions by other branches and are induced to share power. Checks and balances are applied primarily in constitutional governments.
The site of the fist crusade was in jurusalem
Laborers who had previously worked on farms transitioned to working in factories. Cities became a source of poverty, illness and lacked housing due to the transient volumes
The nations were all competing with imperialism. European powers were all fighting to get the African colonies.