Density = mass / volume. therefore, something with a greater density either has a larger mass or a smaller volume. Think of density as how compressed something is: more "stuff" (mass) or a smaller "space" (volume) will make whatever that material is more compressed.
Xerostomia (hypo functioning of salivary glands )
I think the answers are B and C. In the picture, you can see Carbon Dixoide being emitted into the atmosphere, which contributes to the photosynthesis and the formation of ATP to provide a source of energy.
I believe the answer is C
