Final answer:
The command "cover" in a drill formation calls for raising the left arm to form a right angle at the elbow, with fingertips placed about a hand's breadth from the person in front's shoulder for appropriate spacing.
Step-by-step explanation:
The command "cover" typically refers to a drill movement in military or marching band contexts where individuals align themselves directly behind the person in front of them in a formation. During the command "cover," you would raise your left arm so that the arm forms a right angle at the elbow. The fingertips should be placed close but not touching the shoulder of the person in front of you, typically around a hand's breadth away. This distance allows for proper spacing between individuals in the formation. The precise protocol can vary slightly depending on the specific drill instructions of a military branch or organization.
In a more general sense of physical movement, 'cover' could imply various positions or movements depending on the context. However, referencing the alignment in a formation and ensuring proper spacing as detailed in military and marching band drills is the most common interpretation of the command "cover."