Investors & landlords

Thanks for your respond.  My child is only 8 years old.  He doesn't work.  I only have UTMA account for him.  I sold stocks in his UTMA account .  I received form 1099-B for my child.  Form 1099-B shows that he has $1090 gain.  So I don't need to file tax for him?  Also, is capital gain from selling stocks considered unearned income?  Thanks!