What do employers want when they ask you to include your personal background in your resume?

I'm a fresh graduate, and I'm starting to send out resumes. One company replied to me and asked me to include my personal and family background in my resume. My resume already contains my career objective, educational attainment, extracurricular activities, skills (languages spoken, computer literacy), trainings and conferences completed, and personal information like contact numbers and date of birth and civil status and citizenship. What more do they want to see when they say personal and family background?