The judicial branch acts as a check on executive power by interpreting laws, reviewing executive actions, and ensuring they align with the constitution. Through judicial review, courts have the authority to invalidate laws or executive actions deemed unconstitutional, promoting a system of balanced governance. This function guards against potential overreach by the executive, protecting individual rights and upholding the rule of law. By providing an impartial forum for conflict resolution, the judicial branch contributes to stability in the political system, ensuring that no branch exceeds its constitutional authority.