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The primary succession refers to the development of communities on a:

1. freshly cleared crop field
2. forest clearing after devastating fire
3. pond, freshly filled with water after a dry phase
4. newly-exposed habitat with no record of earlier vegetation

Correct answer: newly-exposed habitat with no record of earlier vegetation

Solution

Primary succession occurs in areas where no previous vegetation or life existed, such as newly-exposed habitats like bare rock or lava flows. This distinguishes it from secondary succession, which occurs in areas with prior vegetation.

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