Final answer:
Kent Flannery's broad-spectrum revolution refers to the pre-agricultural era when human diets diversified, leading to food production through the cultivation of plants and domestication of animals. Subsequent agrarian and Green Revolutions further increased food production with technological advancements. The Industrial Revolution introduced industrialized agriculture and global distribution, greatly impacting the availability of food.
Step-by-step explanation:
The term broad-spectrum revolution, as described by Kent Flannery, refers to a period in prehistory during which there was a significant increase in the range of plant and animal species exploited by human societies. This diversification in diet occurred in the Late Pleistocene, just before the advent of agriculture, and is seen as a precursor to food production. The broad-spectrum revolution led to food production as populations settled and began to cultivate a variety of plants and domesticate animals, transitioning from foraging to farming. This marked a profound change in human history, leading to the development of permanent settlements and the beginning of civilization.
Later transformations, such as the agrarian revolution and the Green Revolution, built upon these early agricultural foundations. The agrarian revolution introduced new technologies and methodologies that significantly enhanced food production. The Green Revolution furthered these improvements in the mid-20th century through the development of high-yield crop varieties and advancements in agricultural techniques that helped to avert the predicted global famines.