Why do ancient Greek sculptures focus on the human body?

Because the ancient Greeks admired bodybuilding, during the ancient Greek period, there were many city-states in Greece. Although they were all Greeks, they all ruled independently. Therefore, in order to unify Greece, each city-state went to war with each other. Since they wanted to fight, the residents and soldiers of the Greek city-states

Everyone must have a strong physique, and the Greeks also like sports very much. They invented the Olympics. The Greeks advocated a strong body, so ancient Greek artists and sculptors often liked to sculpt nudes. They considered nudes to be sacred.

It is perfect and can best reflect people's highest thoughts and beauty, so Greek sculptures are mainly nude.