The food web shows a controlled ecosystem. the relationship between the fox and the rabbit is a relationship. if the number of frogs in the ecosystem decreased because of human activity, then there’s a possibility that .

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explanation:

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answer : haversian

[explanation: -(compact bone is organized as parallel columns, known as haversian systems, which run lengthwise down the axis of long bones. these columns are composed of lamellae, concentric rings of bone, surrounding a central channel, or haversian canal, that contains the nerves, blood vessels, and lymphatic system of the bone)]