The answer is b 15 14 13 and 12
If I recall correctly, I was taught:
The particles in the air (dust, smoke, etc.) increase in density the farther you look. Causing a "fog" effect as you look across large distances. Including shore to shore of an ocean.
Answer:
100 acres of tropical rain forest are cleared every minute.
Explanation:
I had this question on a quiz and got it right. I hope I could help.