What formation is defined by members standing next to each other in a straight line?

The definition of a formation where members stand next to each other in a straight line is best captured by the term "Line." In this context, a line formation emphasizes the arrangement of individuals side by side, creating a straight and continuous sequence. This description aligns perfectly with the characteristics of a line, as it suggests a direct formation that is linear and unbroken.

The term "Row" may seem similar, but it often implies an arrangement where items or individuals are placed in a horizontal manner, which can include both vertical and horizontal dimensions—hence not exclusively indicating the straight situation described. A "Column" refers to a vertical arrangement, where individuals are positioned one behind another, and a "Queue" typically implies a single-file arrangement where people wait in line, often with some form of order such as first-come, first-served. Each of these terms has distinct meanings that do not match the description of standing next to each other in a straight line, making "Line" the most accurate choice.