As Morrie's body deteriorates, so does the condition of the hibiscus plant. The plant's pink petals wither and fall as Morrie grows increasingly dependent on his aides and on oxygen. As his death approaches, so does the death of the plant. It is continually used as a metaphor for Morrie's life and for life itself.
Their are Five senses so the answer is five.
I think the best answer is 'it creates a mood of despair and surrender', but it could possibly be 'it suggests what the characters should be feeling'.
1. Viewpoint. They're trying to make you see things their way. They're trying to show drunk driving is bad.
2. The techniques are if it is persuasive or informative and this is more informative.
3. I know the techniques are effective, they make you not want to drunk drive because you'll get caught and possibly arrested.
Hopefully this helps. Sorry I'm late I just thought while I'm doing the assignment I might as well help you out. I just helped someone else out too.