A stands out most to me, CO comes from the air and air is basically oxygen we breath. When we exhale CO comes out (of course). I would say A is correct.
In our community the ecosystem provides fresh drinking water via pipes called citywater or ground water. It should be protected well, because it is our cities only source of clean water, ''purified''.
Answer:
A.
1. energy
2. nutrients
3. calories, water
4. metabolic rate
5. nutrients
6. weight and height
B.
1. protein, amino acids
2. viruses
3. carbohydrates, energy
4. fibers, glucose
5. fats
a. molecular
b. 'healthy'
Explanation:
please give me brainliest and you're welcome
