The principle of competitive exclusion was stated by

Options

A. Mac Arthur
B. Verhulst and Pearl
C. C. Darwin
D. G. F. Gause

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks about the origin of the principle of competitive exclusion, which is a key concept in ecology.

2. **Identifying the Scientist**: The principle of competitive exclusion was formulated by an ecologist named Georgy Gause in 1934.

3. **Explaining the Principle**: The principle states that two species competing for the same resources cannot coexist indefinitely. One species will outcompete the other, leading to the exclusion of the less competitive species.

4. **Analyzing the Options**:
- Option A (Mark Ather) is incorrect; he is known for concepts related to community stability.
- Option B (W. C. Host) is incorrect; he is associated with carrying capacity.
- Option C (Charles Darwin) is incorrect; he is known for his theory of evolution.
- Option D (Georgy Gause) is correct as he is the one who proposed the principle of competitive exclusion.

5. **Conclusion**: Therefore, the correct answer to the question is option D, Georgy Gause.

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