The things that most strongly influence your personality are your environment, your genes, and your experiences. It has been shown in studies that the environment and our genes both play an important role in determining what oulr personality would look like. However, what we experience personally also affects how we will behave and what kind of personality we will have. For that reason it's a combination of the three.
If affects their brains more especially because the brain is not fully developed yet.
I believe the answer is Extension. Considering flexion would decrease the angle. Hope this helps :)
