Final answer:
Post-WWII, the number of people involved in agriculture in Western Europe fell as a result of technological advances in farming and a shift towards urbanization influenced by the war.
Step-by-step explanation:
After World War II, the number of people farming in Western Europe declined significantly as economies modernized and agricultural practices became more efficient. Technological advancements led to a tremendous increase in yield per hour of human labor, which meant that fewer people were required to work on farms. Additionally, large waves of population displacement occurred due to the war, particularly in Germany, contributing to shifts in labor dynamics across Europe. Many individuals moved to urban centers in search of employment as industrialization took hold and agricultural jobs became less pervasive. This shift was part of a broader trend of urbanization and reflected changes in the agricultural sector such as mechanization and increased productivity.