Answer: Unsaturated Fatty Acids
Explanation: Fatty acid is a long chain of hydrocarbon including a carboxylic group at terminal carbon.
Thus when the fatty acids contain three or ore double bonds between the carbon chains the hydrocarbon chain, it is said to be Unsaturated Fatty Acids.
Unsaturated bonds ae the bonds in which there is a presence of double bonds or triple bonds. These do not come under the category of saturated bonds. Saturated bonds are the single bonds.