Concept:A closed traverse is a surveying method that starts and ends at the same point, using readings taken at each station to check accuracy.Explanation:In a closed traverse, the compass is read at each survey point in turn.As a check, back bearings are also taken to confirm the accuracy of the forward readings.This helps ensure that the traverse closes properly and errors are detected.Answer:A. The compass is read at each point in turn and as a check, back bearings are taken