The biotic factor not involved in the succession:
Correct answer: B. Non-pathogenic microbes
- A. Human beings
- B. Non-pathogenic microbes
- C. Pathogenic microbes
- D. Grazing animals
Explanation
Non-pathogenic microbes are generally not listed as a direct disruptive biotic factor in the standard succession sequence, whereas grazing, humans, and pathogenic organisms can alter community development. Their ecological roles may still be important in decomposition and nutrient cycling.
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