Final answer:
The Service Flag, also known as the Blue Star Flag, has changed over time to reflect the service of family members in the military. Originally, during World War I, a service flag would have a blue star for each family member serving in the military. A gold star would be added if a family member had died while serving.
Step-by-step explanation:
The Service Flag, also known as the Blue Star Flag, has changed over time to reflect the service of family members in the military. Originally, during World War I, a service flag would have a blue star for each family member serving in the military. A gold star would be added if a family member had died while serving. Over the years, the design and usage of the Service Flag have remained consistent, with slight variations in the shape and size of the stars.