The tone used in "Sixteen" and "Through the tunnel", is about someone that tries to prove something to somebody else.
The theme used in both novels, is the eager to prove their worth to someone but for "Sixteen" is the need to prove herself to the reader and on the other hand in "Through the tunnel", the character is trying to prove himself to another boys.
The setting is about overcoming the adversity, individualism and finding their true potential.
Both characters try to impress somebody else and grow in the process.
The plot on both stories is about finding courage, the motivation to move forward.
In both novels the point of view we can see it as a "first person" type.
The conflict is trying to stand up and make themselves note and be appreciated by others.