Concept:A closed traverse starts and ends at the same point; the gap that appears when it fails to close is called the error of closure.Explanation:In surveying, a closed traverse should return exactly to its starting point after plotting.If the plotted end point falls short of or misses the point of origin, the resulting gap is known as the error of closure.This error is not obvious during field measurement; it becomes visible only when the field details are plotted on paper.Thus, among the options, the name for this failure is the error of closure.Answer:C. Error of closure