It is the ozone layer. if we didnt have that we would be exposed to solar radiation but if there is to much caused by greenhouse gases it will bacome to thick leading to a ice age as the sun can no longer pass through.
Serious environmental problems. :)
Answer: y=-3
Explanation:
Equation of a line that passes through (a,b) and (c,d) is given by :-

The equation of the line that passes through the points (-4,-3) and (3,-3) :

Hence, the equation of the line that passes through the points (-4,-3) and (3,-3) : y=-3
Longitude is the measurement east or west of the prime meridian. (Imaginary lines that run around the Earth vertically. up/down.)
I believe it is c I researched all of them and the most convenient is gothic architecture