Final answer:
The white solid substance under the bacon is most likely a lipid, which includes fats that solidify as they cool.
A is correct
Step-by-step explanation:
The white solid substance under your bacon is most likely a lipid. Lipids are a class of macromolecules that include fats and oils, which are nonpolar and hydrophobic. Considering bacon's fatty content, when it cools down, the fat can solidify into a white substance.
This is a common observation when greasy foods cool and the fat begins to solidify. Lipids are one of the four major classes of biochemical compounds, the others being carbohydrates, proteins, and nucleic acids. In the case of the substance under the bacon, it is not a carbohydrate, protein or nucleic acid, but rather the lipid from the bacon fat that has cooled and solidified.