2. population
3. resources
4. ancestors
5. migration
6. genetics
hope this helps
To find information in a magazine, use THE READERS' GUIDE TO PERIODICAL LITERATURE.
The Readers' Guide to Periodical Literature is a reference guide wherein information on recently published articles in magazines and journals are found.
I would say that the best theme to address those key points listed, would be: A. Feeling hopeless is unreasonable when faced with challenges. In other words, we shouldn't feel as if the end of that world is at hand, just because challenges and tests come our way. That is to be expected. Hope that helps.
Your question is bit unclear.