Citizen ship question, applying as family

Dear All,
I am applying for naturalization along with my family (myself , wife , son and daughter)
I am confused as what needs to be supplied for one of the document mentioned below from the mandatory supporting document list:
"proof of Mr XXX's parental responsibility for Mr xxx (Child's name ) "

This is appearing for both parents for both children
I have already scanned the birth certificate of both the children and it has name of both parents.
Minor's Passport also shows both parents name.
Appreciate any help on this.
My appointment is on 16th april 19

Birth Certificate will cover that if parent's names on the certificate are the same as applicant's.