400x because you have to multiply that 40 by that 10
I think it’s
A) Calcium Sulfide
<span>ph measures the degree a substance is an acid or a base.</span>
Deforestation has impacted the quality of life in Brazil by clearing out trees and forest to be able to build more houses, overall expanding population. If I'm not mistaken, this is the main reason.
I hope this is the answer you were looking for and that it helps!! :)