The correct answer is B: cultural environment.
A feral child or a wild child is a human child who lived isolated from human contact from a very young age. Sometimes, they were raised by animals although many question this theory.
Feral children lack enculturation. This is a process in every child's development where the child learns how to behave with accordance to the culture around it. The child learns how to speak, how to use the toilet, how to interact with other human being. As a result of this, feral children often seem mentally impaired, lack social skills and have physical problems.
Their personality isn't developed as well as it should be at their age due to the prolonged isolation which had a profound effect on their emotional and physical well-being.