Which one of the five pillars of islam refers to giving to the poor an needy

What was martin luther king, jr., referencing in the passage that brought him to lead a protest in birmingham?

Many blacks moved from the south to northern cities during world war li looking for employment. after the war, a number of them lost their jobs. why did this happen?

What was the final spark that ignited the “european powder keg” and started world war 1