CORRECT: In addiction, at this ages childrens have the responsabilities of their actions. (4)
in ADDITION, at this AGE, CHILDREN are RESPONSIBLE FOR their actions.
GIVE SYNONYMS FOR SHOULD
OUGHT TO / HAD BETTER / IF I WERE...
When answering the questions from the text with information, it is advisable to include the expressions 'According to the text' or 'According to the author'.