The correct answer is A) President Eisenhower's heart attack and the publication of a study reporting that American children were less fit than European children.
The two events in the 1950s that raised the attention for improving the fitness levels of U.S. children were President Eisenhower's heart attack and the publication of a study reporting that American children were less fit than European children.
After World War II, the US government started to pay attention to the physical fitness of Americans. The young Americans started to gain weight and were out of shape. In the military, officers noted that many soldiers were out of shape in WWII and the Korean War, and officers did not like that. Then, it came the publication of an international study that reported that American children were less fit than European children, and that worried President Eisenhower who signed Executive Order 10673 of July 16, 1956: the creation of the President's Council of Youth Fitness.
The study of the development, structure, functioning of human society and the relationships between people is called sociology and its main goal is to discover the truth according to Max Weber, a German sociologist whose ideas greatly influenced social research and theory.
Deforestation but mainly Desertification.