The key functions of a check-and-balance system in government include preventing the concentration of power, ensuring accountability, and promoting cooperation among branches. This system allows each branch—executive, legislative, and judicial—to monitor and limit the powers of the others, thus safeguarding democratic principles. Through checks and balances, government actions undergo scrutiny that promotes transparency and protects citizens’ rights. It prevents potential abuses of power, encourages dialogue, and ultimately aims to create a governance structure that reflects the will of the people.