Question 4
How do lipids behave in solvents?
The right answer is the one marked above.
Lipids do not dissolve in water or in any other polar solvent, but they do dissolve in organic solvents.
This is not a small detail — it is what lets a lipid form a waterproof layer. Cutin on a leaf surface and wax on an animal's body covering both work because water simply cannot pass through them.