Fluctuations in the earth’s climate during the Pleistocene are thought to be due to __________.
A. astronomical changes
B. methane gases
C. chlorofluorocarbons
D. volcanic eruptions
Answer:A
Fluctuations in the earth’s climate during the Pleistocene are thought to be due to __________.
A. astronomical changes B. methane gases C. chlorofluorocarbons D. volcanic eruptions