Answer:
D. The skin
Explanation:
The skin is usually considered as supply-independent for oxygen delivery. The most affected organs and tissues considered as being supply-dependent for oxygen delivery are heart, brain and lungs. These are the most sensitive to oxygen deprivation, being the brain more than the other organs.
Sitting<span> is sort of their default behavior and a lot of </span>panda<span> keepers seem to think that they prefer to be solitary.</span>
d. the condition of the conducting system.
Answer:
they help lower the activation energy of chemical reactions
