Please help me with this 3 questions

ANSWER FOR NUMBER 1 : Europeans developed the system of feudalism to help provide economic and social stability and safety. Feudalism the feudal system arose as a way of protecting property and creating stability. It was based on loyalty and personal relationships. Monarchs have fiefs to lords, their most important vassals.

ANSWER FOR NUMBER 2:  The crusades were organized by western European Christians  after their centuries of Muslim  wars of  expansion. Their primary objectives were stop the expansion of Muslim states, to reclaim for Christianity the Holy Land in the middle east, and to recapture territories  that had formerly  been christian.

ANSWER FOR NUMBER 3:  The crusades had greatly effected these important areas. The medieval society , the structure the trade and the political system. The political system was changed from feudalism to monarchy in Europe.

in 1859, brown and 21 of his followers attacked and occupied the federal arsenal in harper's ferry. their goal was to capture supplies and use them to arm a slave rebellion. brown was captured during the raid and later hanged, but not before becoming an anti-slavery icon. abolitionist and insurrectionist

explanation: