Answer:
C
Explanation:
Every living thing is made up from cells, as they are the smallest unit of a living thing.
Cell membrane would be corr3eect
We require to keep our water supply clean because we imbibe that water. If our water supply wasn't unsullied, we would die of dehydration. Another reason is that without water, all the crops would die and we wouldn't have any aliment to victual and so we would withal die of hunger.
Density = mass / volume
Plug in the values for mass and volume
Density = 1,800g / 300cm^3
Density = 6 g/cm^3
