The answer is A.....................................................................
Answer:
Color coding is a way to convey information quickly, which facilitates visual search. In this Washington D.C. metro map, as with most schematic subway maps, color coded lines represent the different rail lines. Visual searching occurs when we actively scan the environment to locate a specific feature among many distractors.
Explanation:
Parts of Antarctica are considered to be deserts because it is too dry, there's no rainfall because it is too cold and the amount of snow that falls yearly is comparable with the amount of rains that falls in thee driest deserts on the planet, thus the lack of rain and snow makes it a proper desert, cold desert.
The answer: the soft engineering is that you make not very hard work but hard is that you do it many things
