ANSWER:
accumulation zone.
EXPLANATION:
The accumulation zone of a glacier is where snowfall and moisture collect and compact to ice in the winter, and ice persists throughout the summer.
on an icy mass, the gathering zone is the territory over the firm line, where snowfall aggregates and surpasses the misfortunes from removal, (dissolving, vanishing, and sublimation). The yearly balance line isolates the aggregation and removal zone every year. The gathering zone is additionally characterized as the piece of an ice sheet's surface, more often than not at higher rises, on which there is a net aggregation of snow, which therefore transforms into firm and after that icy mass ice. Some portion of the ice sheet where snow develops and diverts to ice moves outward from that point.
