In the cross-section of a kidney, there are three main regions that become apparent. The outer region is called the "renal cortex", this is where the capillaries are mainly located. The deeper and darker region, that looks like small pyramids arranged in a semicircle is called the "renal medulla", where the filtering of the blood takes place. The flat, tube-like structure is called the "renal pelvis".
We base hypothesis or theories off of data or observations.
I honestly think it would be A.
The brain the moat important part of the nervous system, as it controls every thing you do
