MARKING PEOPLE AS BRAIN-LIST :)

5. Herbivores are also called .

Herbivores are also known as primary consumers.

Explanation:

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"d.) carbon dioxide and hydrogen sulfide"

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