First thing every newborn is get familiar with is Family. For everybody, mothers and fathers are most important person. Newborn try to follow parent's behavior since he thinks this is the best way to be accepted in his surrounded society. For all kids, parents are the best guy to be followed.
Kids spend time with their parents more than anybody else. This helps them in different aspects. First of all, parents monitor their kids better than anybody else and inform him or her, if he/she makes any mistakes ,and also it gives chance to kids to follow their parents in different situation and figure out what is the best action in different situation.
Parents are best guys can show their kid what is appropriate behavior. Every kid in first years of his/her life does not know how he should behave. For instance, He/she does not know how he should start conversation with anybody else or how he can start friendship. Since parents are experienced they can help him out
Parents are not perfect role mother in world but they are the best teacher for their children for two main reason. First of all, they spend time more than anybody else with their kids and moreover, they have more experience about life sounded of his child to teach him how should react in the society.