Answer:
1. direct democracy
2. Greek democracy created at Athens was direct, rather than representative: any adult male citizen over the age of 20 could take part, and it was a duty to do so. The officials of the democracy were in part elected by the Assembly and in large part chosen by lottery in a process called sortition.
3. To be classed as a citizen in fifth-century Athens you had to be male, born from two Athenian parents and over eighteen years old, and complete your military service. Women, slaves, metics and children were not allowed to become citizens.