Aglacier retreats, exposing bare rock and allowing communities of organisms to move in. this is an example of

Answer;

primary ecological succession

A glacier retreats exposing bare rock and allowing communities of organisms such as moss and lichens to move in. This is an example of primary ecological succession.

Explanation;Primary succession is a type of succession that occurs following an opening of a pristine habitat, for example, a lava flow, an area left from retreated glacier, or abandoned strip mine.Primary succession occurs in lifeless area; that is regions in which soil is incapable of sustaining life.The first organisms to appear in areas of primary succession are often mosses or lichens, often known as pioneer species because they are the first species present.

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