• 4.1 Events

  • 4.1.1 to 4.1.3

• 4.2 Causes

  • 4.2.1 to 4.2.6

• 4.3 Effects

  • 4.3.1 to 4.3.4

• 4.4 Resolving

  • 4.4.1 to 4.4.3

• 4.5 Prevention

  • 4.5.1 to 4.5.5

• 4.6 Ask the Professor

  • 4.6.1 Ask the Professor

• 4.7 Extra: Fun fact or good story?

  • 4.7 Extra: Fun fact or good story?