Answer:
a biological predisposition contributes approximately 60 percent to the cause
Explanation:
Gender dysphoria is a state/distress of an individual due to its gender identity. This disorder appears when a person feels like their gender assigned at birth is not matching with their real gender identity. This is a psychological state and these persons very often are transgender.
Twin study has shown that genetics has influence on this condition: it is 62% heritable. However, the real cause is still not confirmed, because of disagreements among scientists.