هنا جانا البرجراف هذا
3 However, environment can, at least in some cases, triumph over biology. A shy
child may lose much of his or her shyness. On the other hand, many people who were not
shy as children become shy as adults, a fact that points to environment or experiential
causes.
وهو يفصل السبب الاول اللي هو الbiological عن السبب الثاني اللي هو enviromental causes
وأسمي البرجراف في هذي الحاله ب transition