Because they traded and made profit from selling people from inside their dominions
<span>The answer is Letter D. It is written in a tone that is appropriate for an explanatory essay than the other letters. Since the letters a,b,c, is informal for an explanatory essay. Letter D. explains the Neolithic Revolution with formality and proper use of words, than the other letters.</span>
Autumn would announce its arrival by (c) SIGHT
It's B, had spent all their savings just to get to America
They change it by making more
