Concept:Rule of Law means that every person and authority, including the government, is subject to the law.Explanation:An independent judiciary ensures that courts can decide cases fairly and without pressure from the executive or legislature.It protects citizens’ rights and upholds the law equally for all individuals.If judges are not independent, laws can be ignored or applied unfairly.Therefore, an independent judiciary is essential for the observance of Rule of Law in a state.Answer:A. an independent judiciary