The casualty drag is correct because it effectively incorporates both strength and endurance components within its execution. This exercise simulates a real-life scenario where a Marine may need to drag a wounded comrade to safety, requiring significant upper body strength and core stability to perform the movement. While dragging a weight like a dummy or sandbag, the participant must endure physically demanding conditions, emphasizing cardiovascular endurance alongside muscular strength.
In contrast, the other options tend to focus more on one aspect than the other. Push-ups primarily target upper body strength and endurance but do not fully encompass the full-body dynamic of the casualty drag. Burpees, while also combining strength and endurance, often prioritize explosive movements and cardiovascular intensity more so than dragging a load. Deadlifts mainly focus on lower body strength and muscular power without integrating the endurance factor required in a prolonged or sustained drag. Thus, the casualty drag stands out specifically for its blend of strength and endurance in a practical application relevant to Marine operations.