The range-based for loop, in c 11, is designed to work with a built-in variable known as the

why is arctic sea ice important? arctic sea ice keeps the polar regions cool and moderate global climate. sea ice has a bright surface; 80 percent of the sunlight that strikes it is reflected back into space. as sea ice melts in the summer, it exposes the dark ocean surface.

it's filtration, but this is an assumption so my apologies if i got this