Ocean warming provides a good example of a potential positive feedback mechanism.
Every normal cell of the body.
The four main elements of the human body are oxygen, hydrogen, carbon, and nitrogen.
The correct answer is <em><u>option A.</u></em> Porter is writing <em><u>social history</u></em> because he is focusing on lives of large numbers of ordinary people. He is examining letters, journal entries, autobiographies and newspapers from that time to see how the fear of the disease affected the lives of ordinary people. Porter is trying to recollect data from that time and put together a piece that describes how society was affected by the influenza pandemic, which was a consequence of World War I, an historic event that shaped and changed many societies, specially the ones from Europe.
