Which observation could be traced back to the practices of early hunter gatherer societies ? A. The use of rooftops for family gardens B. The disappearance of many large herbivores C. Air, water, and land polluted by fossil fuels D. Evidence of artificially irrigated land

One important development during the 3rd trimester that will insulate the infant against changes in temperature is a. the deposition of fat under the skin b. the closing of the septum between c. the atria of the heart d. the beginnings of lung functioning e. the beginnings of light and sound sensing