1. Natural disaster.b. Nuclear war.3. Human promulgated climate change.4. Uncontrollable disease.e. Alien invasion.f. Famine (caused by any of the above).7. Trump. 8. O... more1. Natural disaster.b. Nuclear war.3. Human promulgated climate change.4. Uncontrollable disease.e. Alien invasion.f. Famine (caused by any of the above).7. Trump. 8. Other____________