Which factors contribute to the extinction of a species

1: more individuals fighting over the same resources

3: the loss of the environment in which an organism’s needs are met

6: the introduction of new predators into an area

Explanation:

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primary succession occurs in essentially lifeless areas regions in which the soil is incapable of sustaining life as a result of such factors as lava flows, newly formed sand dunes, or rocks left from a retreating glacier. secondary succession occurs