Your answer is it protects the heart and lungs
Answer:
A compounds
Explanation:
when carbon bonds with other elements it's termed compound.
Answer:
B. it gives off no radiation
Explanation:
Dark matter is so named because it neither absorbs nor emits light and therefore cannot be directly observed.
After nutrients are absorbed during digestion, the excretory system removes solid waste products, or feces, through the rectum. The excretory system also works with the respiratory and circulatory systems and removes carbon dioxide from the body
