male hormones in boys cause their brains communicative areas to become smaller.
after this change , male and females take different paths in their development.
this can be seen from a young age. in groups, ( 접속사) , girls will tend to act in harmony
while boys will compete with each other.

위 문장 괄호안에 들어갈 접속사는 instead 인가요? for example인가요? 프린트마다..답이 달라서..
정말 모르겠어요..중요한 문제인데..아시는 분..좀 가르쳐주세요...