An organism's role, or lifestyle, within the structure of an ecosystem is its: habitat. trophic level. symbiotic relationship. ecological niche. limiting resource.

answer: if she breaths she a thho

explanation:

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)]

c. establishing proper sleep hygiene