Answer:
The correct answer is letter "A": Non-normative life.
Step-by-step explanation:
Non-normative life events are unexpected, unpredictable life episodes such as natural disasters, loss of a relative or war. These events could be negative -like the ones mentioned before- or can be positive in other cases like winning the lottery, for instance.
In the example, there are three negative non-normative life events: the tornado, Anna's house being wrecked by the tornado and, his neighbor's decease as a result of the tornado.