Material 2 deals with a way to practice democracy. What is this?

Material 2 The jury court is a daily judicial organ, and the cases tried by each court are selected by lot. The selection of rooms, presiding judges, water meter supervisors and scrutineers of each court is also decided by lots, and their duties are one-off, so lots need to be drawn again in the next court session.

Material 2 relates to a way of practicing democracy. What is this? What problem is this decision to solve?

Draw lots with reference to the answers. Maximize fairness and avoid bribery and fraud.