There are many aspects that influence the development of a child. These aspects are generally catagorised in "nature" or "nurture" influences. Nature refers to those traits that have been handed down through heriditary, and nurture refers to the traits that have been developed from the way the child has interacted with their environment.
The nature vs nurture debate is on-going within the psychology community, and can be more accurately looked at by considering how much each contributes, and in what way nature and nurture affects development.
Nature and nurture often combine to create the end characteristics of the individual. Consider a child who is genetically physically attractive. Studies have shown that physically attractive children are treated more positively than less attractive children at school. This can give a greater self-worth, more attention so more chance to develop academically, and more confidence. The way the child is treated (an aspect of nurture) occurs in response to their physical appearance (an aspect of nature), so the resulting personality, behaviours, intelligence etc are created by a combination of nature and nurture.