    Sentence 1: Adults ; wha were shy as-toddléts , had  stronger : brain : activity’ in -a part of the: brain  _dssociated with coyness .    ‘Sentence. 2: When. sHiown. pictures::of ‘unfainilidr.  faces ', ‘adults ‘who were shy toddlers showed: a  relatively high Jevel.of activity-in a pact of the brain  called the amygdata..    