Organized systems of agriculture, the maintenance of herds of domesticated animals, and permanent, year-round settlements marked a. paleolithic era c. bronze age b. stone age d. neolithic era

I think the correct answer from the choices listed above is option D. Organized systems of agriculture, the maintenance of herds of domesticated animals, and permanent, year-round settlements marked the Neolithic era. It was the final stage of cultural evolution or technological development among prehistoric humans.