I think the answer might be the second one but t let me know if I am wrong
The London-Smog occurs mostly in winter and is a mix of gaseous and solid aerosoles as well as natural fog. The Los-Angeles smog is dry, and formed mostly during sunny and hot weather conditions.
<u>Answer:</u>
(A) Studying algebraic equations in math.
This was made possible by contributions of Islamic civilizations
<u>Explanation:</u>
“Muslim scholars” contributed largely in the field of Mathematics in the golden age of Islamic civilization. “Arabic number system” is widely used even today.
The first great achievement was introduction of ‘’Arabic numerals’’. It explains the "place-value" theory, which allows numbers to be expressed by “nine figures” and zero. This development made calculation very simple and also paved the way for the development of a completely new division of mathematics which is “algebra”. Even Arabic words entered Western vocabulary like “Al-JABR” became “Algebra”.
A. he thought without him his country would fail