Final answer:
The Competitive Exclusion Principle states that when two species occupy the same niche, one will out-compete the other and be excluded.
Step-by-step explanation:
The correct answer is Competitive Exclusion Principle. According to this principle, when two species occupy the same ecological niche, competition for limited resources will lead to one species outcompeting the other. The more successful species will have access to more resources, such as food and habitat, which will allow it to thrive and reproduce while the less successful species will struggle to survive and may eventually be excluded from the niche.
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