B.
And maybe put your question in the English/Literature tag next time lol
Animals contribute water mainly through breathing, perspiration and urination. ... When droplets of sweat evaporate from the surface of an animal's skin, they take a bit of the animal's body heat with them. They also turn into water vapor and enter the water cycle, just like water evaporating from plant leaves.
The formula of Density is known as:
Density = mass/volume
Units: g/cm^3
Hope this helps!
