Respuesta :
I would say the answer here is memory.
Emotion, brain development and language are all very important factors in the development of a young child. Memory is not as important but I am not 100% sure.
Language is learned so therefore thats the answer. Brain development being the most important. Lack of memory is a disease, where as emotion is something your born with because babies cry when they are born. What is learned or taught is considered not important