Because they should know if the thing they are studying is like from or about or how it was made
During the second world war, the US government took strong measures to convert the economy to meet the demands of war. President Roosevelt established an organizations like:
1.) War Production Board whose task was to convert industries from peace time works to war needs, allocate scarce material, establish priorities in the distribution of materials and services.
2.) Office of Civilian defense was also established and were tasked to coordinate state and federal measure for the protection of civilians in times of war.
3.) Civil Air Patrol (CAP) was also created for search and rescue missions.
4.) Civil Defense Corps which organized millions of volunteers to fight fires , decontaminate following chemical weapon attacks, and provide first aid.
The last Carolingian King of France was Luois V. He died aged 20 without children and had only one brother who died before him and this was the end of the Carolingian dynasty.
The successor was Hugh Capet - this is the correct answer. Hugh was also a descendant of Charlemagne. <span />