Although we may sometimes neglect to cultivate our own happiness, feeling happy is intrinsically important. If we are happy it has added knock on effects and benefits. These include us becoming more compassionate and feeling healthier both physically and emotionally. We become more creative, witty, energetic and fun to be around and it can also lead us to become more financially successful.
I would say harsh or rough
The question that is most clearly analytical in nature is C. why did the author decide to start in the middle of the action?
A and D are not so analytical, as all you have to do is count the mistakes or chapters. B is also not analytical because you can just retell what happened. But C is analytical because you have to analyze the author's motives behind his decision to start the story in the middle of the action.
The events that took place or for short "the events" is the direct object of your sentence. Correct answer is A