Why can glaciers form at higher altitudes

answer:

a glacier forms when snow accumulates over time, turns to ice, and begins to flow outwards and downwards under the pressure of its own weight. in polar and high-altitude alpine regions, glaciers generally accumulate more snow in the winter than they lose in the summer from melting, evaporation, or calving.

glaciers begin to form when snow remains in the same area year-round, where enough snow accumulates to transform into ice. each year, new layers of snow bury and compress the previous layers. this compression forces the snow to re-crystallize, forming grains similar in size and shape to grains of sugar

explanation:

what events in mexico's history might explain why the country continues to have difficulty improving social justice and economic opportunities for all people?