Are you looking to answer all the questions?
Answer:
dear stranger<3
option no . a is the correct answer
Answer:
(1+x)(1-x)
Explanation:
Since both terms are perfect squares, factor using the difference of square formula
a^2 - b^2 = (a+b)(a-b) where a = 1 and b = x.
I would have to say the answer is C.
A is incorrect since hydrogen is not an air pollutant.
B is incorrect because ozone is most definitely one of the top.
And D has cyanide which is a chemical for suicide during wars.
Hope this helps!
