Adolescents are especially vulnerable to the physical and mental health risks of e-cigarettes due to their bodies not yet being fully developed.

A: become a alien but sound like a human

Singular third person pronouns are “he,” “she,” “it,” “his,” “hers,” “him” and “her,” and third person plural pronouns are “they,” “them” and “their.” the number of people to which you are referring should always match the pronoun you choose (“he” to refer to one male, “they” to refer to more than one male).