Answer:
Democracy, meaning "rule of the people", is a system of government in which the citizens exercise power directly or elect representatives from among themselves to form a governing body, such as a parliament. Democracy is sometimes referred to as "rule of the majority"
number 1
Economic problems, government corruption, crime and private armies, and the rise of Julius Caesar as emperor all led to its eventual fall in 27 BCE. Rome's continued expansion resulted in money and revenue for the Republic.
that is number2
In a pure democracy, laws are made directly by the voting majority leaving the rights of the minority largely unprotected. In a republic, laws are made by representatives chosen by the people and must comply with a constitution that specifically protects the rights of the minority from the will of the majority.
that is 3 I hope this will help you