I think it is c but I’m not 100% sure so wait for someone else to answer too maybe ?
Your answer would be valence electrons, i believe.
They lose water by evaporation on their skin and respiratory surfaces
Answer: C
Explanation: Left ventricle. With the thickest muscle mass of all the chambers, the left ventricle is the hardest pumping part of the heart, as it pumps blood that flows to the heart and rest of the body other than the lungs.
