When you exercise makes your body uses oxygen so breathing heavily increases your heart rate causeing your heart to pump more blood.
Answer:
B. Postindustrial
Explanation:
A type of society in which food production—carried out through the use of human and ... Production is slow, and the amount that can be produced is limited. In preindustrial societies most economic activities are carried out within the home setting. ... Higher crop yields allow agricultural societies to support large populations.
Answer: A
Explanation: A stream terrace basically forms through this process– Temporary base level is eliminated; the stream downcuts upstream from the old temporary base level, and the former floodplain is left well above the present elevation of the stream.
genetic variation is the answer
Question number one for what?