Look at the two types of fatty acids below, saturated and unsaturated. What is the difference between the two?

Answer:
Saturated fatty acids don't have double bond between two carbon atoms, while in unsaturated fatty acids have atleast one double bond between two carbon atoms.
I've a trick for you to remember this
Saturated → Single Bond (you can remember by The first later of both word i.e., "S")
Unsaturated → Double Bond
-TheUnknownScientist 72