Define "activity". The obvious answer would probably be building the pyramids. Although there's no real proof or answer to how they were built, it likely utilized a vast amount of peasants and slaves.
hot and old and ancient
no
Cooperation between Sparta and Athens during the classical Greek era created peace and prosperity in Greece while conflict between Sparta and Athens broke ancient Greece and began the downfall of the society. These events defined the course of ancient Greek history.
Meat was required.
in grece
The ancient Egyptians built enormous pyramids to protect important mummies.
Farming
Cooperation
Ancient water flows and past geological activity.
i really dont know
Citizen soldiers, who were heavy infantry and called out for operations when required, and underwent monthly training activity; augmented by slave light infantry and archers. A large war fleet manned by citizens and hired seamen.
Very few people were literate in Ancient Egypt. As they used hieroglyphs, not an alphabet, the number of signs that had to be learnt was enormous. It was at lengthy process, carried on a schools for scribes.