1. Genetics/heredity.2. Diet/nutrition.3. Metabolism/phisiology.
4. Exercise/physical fitness.5. Physique/body type.6. Stress levels/temperament.7. Environment/comfort level.8. Anx... more1. Genetics/heredity.2. Diet/nutrition.3. Metabolism/phisiology.
4. Exercise/physical fitness.5. Physique/body type.6. Stress levels/temperament.7. Environment/comfort level.8. Anxiety levels/psyche. 9. Intelligence/education.10. Sociological/economic.11. I don't know. 12. I know, but I won't tell you. 13. Lemme alone, willya; I'm trying to get some sleep.14. Two or more of the above.15. None of the above/other answer:______.~
