This is true. Urea carries the bloodstream to your kidneys which then transport waste along with water to form urine.
Light receptors within the eye transmit messages to the brain, which produces the familiar sensations of color. Newton observed that color is not inherent in objects. Rather, the surface of an object reflects some colors and absorbs all the others. We perceiveonly the reflected colors.
Earthquakes occur because of the pressure and density.
I don't think the answer is A as that seems a bit drastic, I think it's C.
