Does all human activity have a negative impact on the environment and ecosystems? *
A:NO
B:YES

Please help for my homework

A. NO

Explanation:

Because it depends if the activity. negatively or positively. Because humans can be very careful of how they affect the Earth and sometimes they can't.

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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)]