Final answer:
The history of Preparation for the Future (1939-1965) relates to the subject of Social Studies. Studying this period helps students understand the social and cultural developments that shaped the modern world.
Step-by-step explanation:
The history of Preparation for the Future (1939-1965) relates to the subject of Social Studies. During this period, significant social, political, and economic changes occurred, such as World War II, the Civil Rights Movement, and the Cold War. Studying this period helps students understand the social and cultural developments that shaped the modern world.