Final answer:
The period in question, when foragers moved towards a broad-spectrum, generalized economy following the glacial retreat, is referred to by Kent Flannery as the 'broad-spectrum revolution,' marking a shift towards agriculture and animal domestication.
Step-by-step explanation:
With the glacial retreat, foragers adapted to a generalized economy, a process Kent Flannery referred to as the beginning of the 'broad-spectrum revolution.' This term describes the shift in subsistence strategies of human societies from specialized hunting of a few large game species towards a more diversified subsistence base, including a wide range of smaller animals and plants. It marked the transition from a purely hunting and gathering lifestyle to one that increasingly embraced agriculture and animal domestication, laying the groundwork for the Agricultural Revolution.