A close relationship between two species.

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Multiple Choice

A close relationship between two species.

Explanation:
Symbiosis is a close, long-term interaction between two different species. In these associations, the partners live together and influence each other’s survival or fitness, and the relationship can be mutually beneficial (like pollinators and flowering plants), neutral for one and beneficial for the other (commensalism), or harmful to one and beneficial to the other (parasitism). The other terms describe different ideas: a niche is the role an organism plays in its environment, not a direct relationship with another species; competition is about competing for the same resources; predation is one organism feeding on another, which is not a sustained close association.

Symbiosis is a close, long-term interaction between two different species. In these associations, the partners live together and influence each other’s survival or fitness, and the relationship can be mutually beneficial (like pollinators and flowering plants), neutral for one and beneficial for the other (commensalism), or harmful to one and beneficial to the other (parasitism). The other terms describe different ideas: a niche is the role an organism plays in its environment, not a direct relationship with another species; competition is about competing for the same resources; predation is one organism feeding on another, which is not a sustained close association.

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