B because theyre in order of the number of protons
B) Convection ;)
P.S I just took a test and got this right
The total energy from an isolated system is constant; energy can be changed from one form to another, but can't be created or destroyed.
<span> c. urea. Healthy kidneys filter the blood in our bodies. They remove waste materials like uric acid, urea and creatinine through urine. </span>Processes facilitated by kidneys such as regulating concentration and volume of body fluids help in maintaining homeostasis.