#1. The gods and goddesses are important in the peoples life in the Greek in the ancient times because they practice it as part of their natures and everyday basis.
#2. I think its about the symbolism that the mythology use that would represent gods and goddesses.
#3. The similarities of them is that they are classified according to their father or their origin and also they are more powerful if people are always pray their names.
#4. By means of using them in their culture and make them one of their everyday lives.
#5. Yes, people builds temples and churches depends on the god and godesses that they worship.