Why wears Hijab?

This is the second entry about hijab. Referring to the question, mostly Muslim women wear hijab. As they reached "akil baligh" (matured), it is the mandatory to wear Hijab.Some Muslim parents also teach their daughter to wear hijab at very young age. Those small girls look very cute in a lovely colorful hijab. This law was recorded in Quran and also had been told by The Prophet Muhammad. Quran tells Muslims to obey the Prophet Muhammad, means to take the prophet as an idol for life.