Answer:
c. double bonds is the correct answer.
Explanation:
Saturated fats: no double bond is present in their chemical structure,they have single bond.
In room temperature they are solids.
They are present in different variety of food like
Unsaturated fats: They have one or more double present in their chemical structure.
In room temperature they are liquid.
food having unsaturated fats are
Thus lipids differ in their degree of saturation or unsaturation due to their number of double bonds.