Why does jam crystallize?

Crystals throughout the jelly may be caused by to much sugar in the jelly mixture. Crystals form on top of jelly that is opened and allowed to stand are caused by evaporation of liquid. hope I helped!

i think its the outcome of people's preferences.

the committees of correspondence were the american colonies’ means for maintaining communication lines in the years before the revolutionary war. in 1764, boston formed the earliest committee of correspondence to encourage opposition to britain’s stiffening of customs enforcement and prohibition of american paper money. the following year, new york formed a similar committee to keep the other colonies notified of its actions in resisting the stamp act. in 1773, the virginia house of burgesses proposed that each colonial legislature appoint a committee for intercolonial correspondence. the exchanges that followed built solidarity during the turbulent times and bring about the formation of the first continental congress in 1774.