Answer:
The IP (Internet protocol) provide the "Best efforts service" as it mainly providing the packet delivering service in the networking system for communication.
The IP plays an important role in the communication as it helps the data or information breaks into small packets so that it can efficiently deliver the message to its destination.
The IP is known as best effort service as it delver the data or message to their particular destination with efficiently but it does not provide any type of special service for re-transmitting the lost packet in the network.