Answer:
I think its C sorry if its wrong.
<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>
<span>Better transportation, War Modern technology, Embargo Act of 1807, Assembly</span>