To survive hunter-gatherers changed their environment bya. Burning the prairies to prevent trees from growing. B.Spreading plants to areas beyond where they originally grew. C.Both (a) and (b)d. Neither (a) nor (b)

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)]

carbon atoms, hydrogen, oxygen, and nitrogen.

paper covers rock.

explanation:

rock only smashes scissors.

find out why you don't need to aim at such a syllable pattern in english. you may have thought that haiku was supposed to be 5-7-5, so what's up with the logo by the gravitational pull of celestial objects, can touch us in unexpected ways.