To survive hunter-gatherers changed their environmental by
a burning the prairies to prevent trees from growing
b spreading plants to areas beyond where the originally grew
c. bloch (a) and (b)
d. neither(s) or (b)

Where was goodyear located? a) northeast b) southeast c) northwest d) southwest

What makes water a renewable source

According to subpart d, research with children may be eligible for exemption when: the children will be asked to complete a surveythe research involves the use of educational teststhe children will be interviewed by the researcher.the research with children will involve participant observation with researcher interaction.