Answer is (b)
2,3,1 is the stoichiometry
The values in front of the elements are the stoichiometric values
(Since Al2Br6 has no value in front, it's considered 1)
The sewage dumps were toxic so it would effect the air and cause many help issues especially with lungs.
Force causes all motion, and the larger the mass of an object the stronger the force needs to be to accelerate the object.
