<h2>A. It gave people a steady food supply for the first time.</h2><h2>D. It began when people first deliberately planted seeds</h2>
Explanation:
This revolution began when people deliberately started to plant seeds, and was a significant change, because this practice allow them to stay in one place and establish larger societies. This period is know as Neolithic period, or Neolithic revolution, because it mark the changed from hunting, fishing an recollecting to farming and cattle raise. (Also domestic animals began to appear)
