1. when does the autumnal equinox occur in the southern hemisphere? (1 point)june 21 march 21 september 21 december 21,

The autumnal equinox takes place on the same date in the southern hemisphere as the spring equinox, since the seasons are in "opposite" order as the calendar falls. In this case, the autumnal equinox would fall on March 21, since this is the date of the spring equinox in the northern hemisphere.

March 21 is the answer

This movement is also referred to as  glacial plucking