Concept:The executive arm of government is responsible for enforcing laws and ensuring public order.Explanation:The executive implements and enforces the laws made by the legislature.It maintains law and order through agencies such as the police and other security forces.These agencies carry out day-to-day duties like crime prevention, arrest of offenders, and protection of lives and property.The military may assist in internal security, but routine maintenance of law and order is an executive function.Answer:D. executive