Answer:When the northern latitudes get less sunshine, temperatures drop and water freezes into ice at the beginning of an ice age. When the northern latitudes have more sunshine, the temperatures increase, ice sheets melt and the ice age ends.
Step-by-step explanation:
-temputures rose
-glaciers melted
-larger animals went extinct; new species of smaller animals emeged and thrived
-ocean levels rose--land bidges between continents vanished
-grasslands and forest gew where ice had been
-people began living in permanent settlements