Answer:
The answer is Scapula and Clavicle.
Substance abuse such as drugs, alcohol and tobacco, family problems such as domestic violence and abuse, social problems such as peer pressure, bullying, and exclusion, and so many other environmental reasons, but substance abuse, family dysfunction and social problems are the common reasons why.
I'm going to answer this based on context, so it may not be accurate, but it's how I feel.
Eduardo doesn't communicate with his partner. He gets frustrated. Then he's filled with resentment. His partner is unaware. The relationship most likely won't be good from this point unless Eduardo learns to communicate with his partner. Otherwise, the relationship will most likely be out the window in a while.
Hope that helped! :)
Have a good day! :)
DISCLAIMER: ALWAYS. Heck with a reliable source!