The
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resulted in glaciers covering much of the Earth.

A glacier's weight, combined with its gradual movement, can drastically reshape the landscape over hundreds or even thousands of years.

Explanation:

The ice erodes the land surface and carries the broken rocks and soil debris far from their original places, resulting in some interesting glacial landforms.

ecological systems theory 

Bronfenbrenner's ecological systems theory basically states that various factors internal and external to a child influence his or her development and growth, both physically and psychologically. One of the factors that influence a child's growth and development is the way parents relate to him or her and treat him or her differently as he or she grows in age.