Sorry I need the points have a good night
The correct answer is agriculture. It was made possible for people to live on a single piece of land and not be nomadic anymore in search of food. Agriculture enabled them to settle around river valleys like Nile or Tigris and Euphrates. This is the era when civilizations started rising worldwide.
<span>utilizing the power of environment</span>
D seems to be the most correct. Hope that helps!
The answer is that it has allowed cultures to spread quickly and easily from one country to another.
