Final answer:
The statement about male adolescents universally thinking of themselves as action heroes and feeling invincible is false. Identity development during adolescence can vary widely among individuals and is not limited to one specific type of behavior or self-perception.
Step-by-step explanation:
The statement that it is normal for male adolescents to think of themselves as action heroes and to act as though they are made of steel can be considered false.
During adolescence, individuals develop a sense of identity and often explore different roles, which can include mimicking heroes or exhibiting invincible-like behavior; however, this is not a universal experience and should not be generalized as "normal" for all male adolescents. It's worth noting that adolescence is a period of significant psychological development, characterized by various changes that include establishing independence, experiencing mood swings due to hormonal changes, and developing the ability to think abstractly.