The option that best describes the cause-and-effect structure in a memoir is when the structure focuses on an incident and its consequences.
I would say that the correct option is the third one.
The cause is the incident, and the effect are its consequences.
Formation of an application letter
Your answer is "why"
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<em>‘wherefore’ is a bit more difficult because it could be confusing. In Renaissance English ‘wherefore’ meant ‘why.’ So Juliet is saying “Why are you Romeo?”</em>