C) Red Blood Cells
Red blood cells contains hemoglobin, which provide oxygen
If you believe there has been a heatstroke, you would call 911 immediately. You then should move the person out of the heat, remove excess clothing, and cool the person in any way possible, such as a cool bath or shower.
I would give him a short shot and make him run up because chances are if he likes baseline, he might not be as good as volleying.
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.