2. Religion and War, God and Kings played an important role in the subjects of these sculptures. For example, Jeus and Alexander.
3. In third picture, we can see the sculpture was not made in a single stone, rather part by part, tied with special instruments. The hand of the sculpture has been disintegrated somehow.
4. The nose and head of these sculptures are broken probably due to the Turkish invasion. These has been the trends of different aggressive community in past in many different countries.
I am not sure of that fact of weather these are correct, but these are merely my own observations after witnessing some museums in Acropolis, like Ancient Agora.