I believe this is two, you walk facing the traffic, so that a car is not coming up behind you.
Answer: Even though fats are the most energy dense of the three energy yielding nutrients ,carbohydrates which provide four calories /gram are your body's first choice for energy especially immediate energy.
Discerning is the answer to your question.
Brightness is an attribute of visual perception in which a source appears to be radiating or reflecting light.In other words, brightness is the perception elicited by the luminance of a visual target. This is a subjective attribute/property of an object being observed and one of the color appearance parameters of color appearance models.
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