What was used as a warning system in the old north church

The answer is a lantern.

Explanation:

Old North Church was located in  the North End, Boston and it is considered a mission regarding the Episcopal Diocese of Massachusetts. The lanterns were used in the Old North Church to warn Charlestown patriots that were across the Charles River concerning the different British Army's movements.

This method in which the lantern was used was important because it allowed informing the back-up riders that were in Charlestown regarding the British movements. These back-up riders' purpose was to warn Lexington and Concord in the case that Revere and Dawes were arrested.  

    racial conflict and discrimination has existed ever since man learned to kill with rocks and bones. these conflicts arose from disputes between territory, power, wealth, religion, or simple difference. some of the most infamous racial disputes include slavery, the holocaust, and the civil rights movement.

    these listed disputes often resulted in casualties from all sides. riots, wars, imprisonment, and lynching are all commonly associated with racial conflict on severe levels.

      however, racism is an improving issue in recent decades. people are being more accepting and welcoming of diverse populations. though, the world isn't perfect and it will take much more time, if ever, until the world is rid of racism.

all freedom fighters demanded for constitution. so british finally granted india it's freedom. then a constituent assembly was formed. it's chair man was rajendra prasad and its deputy chairman was dr. br ambedkar.

this assembly take the time of about one year than our constitution was finally formed.

explanation: