Self introduction, and questions

Hi, I'm new user in here. Now I intership as IT staff at AKTI, I will question about "How standard database relational in laravel?" example : student: id,users_id,mentor_id,section_id,departement_id. or student: id,users_id,mentor_id. and mentors: id,users_id,section_id. section: id,users_id,departement_id. So which one is correct?