Write a letter to a friend or family member you might be concerned about.
Address these areas:
Concerns about their well being
Stress level
Self Estccm
Self Concept
How would you cffectively help your friend in these areas

Help calm your friend down and make them believe in them self.

Explanation: Hope this helps

With the bolded word being complexities, the definition is...  

parts of something that are hard to understand  

Explanation:

In order to define the bolded word in this context we need to understand that “the detective novel was hard to follow because of the complexities in the plot.” therefore the right answer should be...  

"parts of something that are hard to understand"  rather than “the way in which pieces are put together or arranged.”