The term Dovetailing is used when two activities are grouped together and scheduled in a way that saves time and energy. It involves overlapping tasks to maximize efficiency.
Step 1: Analyze the options.
- (A) Fatigue: This is unrelated to scheduling or grouping activities. Fatigue refers to tiredness or exhaustion.
- (B) Time Plan: This refers to a general plan or schedule but does not specifically refer to grouping activities for efficiency.
- (C) Labour saving: While labor-saving methods are used to improve efficiency, it does not specifically describe the process of grouping activities together.
- (D) Dovetailing: This is the correct term, referring to the efficient scheduling and grouping of activities to save time and energy.
Step 2: Conclusion.
The correct answer is (D) Dovetailing, which is a method of efficient task scheduling.
Final Answer:
\[
\boxed{(D) \, \text{Dovetailing}}
\]