Acommunity's species diversity is a) increased by frequent massive disturbance. b) increased by stable conditions with no disturbance. c) increased by moderate levels of disturbance. d) increased when humans intervene to eliminate disturbance. e) increased by intensive disturbance by humans

A community's species diversity is C) increased by moderate levels of disturbance.

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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)]

density and pressure