Answer:
Peat
Explanation:
The decaying plant matter that is found in bogs results in the production of peat. It is not fully decayed by either acidic or inorganic environmental conditions, rather present or composed of wet-land plant life. it is rich in carbon dioxide. It is also an important source of fuel.
Blood flow to the heart via the following vessels:
1. superior vena cava
2. inferior vena cava
4. coronary veins/sinus
Boron And Carbon are the elements five and six
C should do the trick but I wouldn't count on it ive only been studying for a day now on this
Body's major metabolic hormone is called Thyroid hormone