D. nephrons - the structural and funtional unit of kidney
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The correct answer is The liquid at the top is the least dense
Explanation:
In this situation, liquids appear to be stacked or organized in different layers due to differences in density. This factor (density) is determined by the mass and volume of the liquid. For example, the density of water is 1 gram per milliliter, while the density of honey is 1.40 grams per milliliter, which makes honey to have a higher density.
Moreover, if liquids are in a container, the liquid or liquids with a lower density will go to the surface, while more dense liquids will sink. In this context, the liquid at the top is the least dense, while the liquid at the bottom is the densest.
