Answer:
what is the question I do not understand
Answer:
Explanation:
tabaquismo;
contaminación del aire en espacios cerrados;
contaminación exterior;
alérgenos;
exposición a riesgos ocupacionales como el polvo y productos químicos.
<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>
