A. Refine the graph by adding the interval of time of extinction with a label drawn from the table as shown by “a”.
B. Analyze these data in terms of the clustering of extinction events.
C. Based on your analysis, explain how ecosystems have changed during the last 40,000 years, changed and identify the factor that caused these changes.
D. Based on the correlation between Earth’s temperature and the concentration of CO2 in the atmosphere, predict what will happen to animal populations in the future.