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o Glucose, which required light, water and carbon dioxide to form this substance

1. efficient use of space

2. elimination of groundwater contamination

3. energy generation

4. lower carbon footprint

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)]