Saturated fats have long straight tails of fatty acids, while unsaturated fats from vegetables have kinks in their tails due to double bonds. These kinks prevent the fats from packing together as tightly. Hydrogenated vegetable oils have hydrogens added back to the double bonds and thus behave like .

a. Unsaturated fats
b. Carbohydrates
c. Protein
d. Saturated fats

d. Saturated Fats

Explanation:

One type of dietary fat is saturated fat. Along with trans fat, it is one of the unhealthy fats. Most usually these fats are solid at room temperature. Foods such as palm, butter and milk, red meat and coconut oils have a high saturated fat content.

Saturated fatty acids are compounds comprising a group of carboxylic acids with a long hydrocarbon chain, consisting of atoms of hydrogen (H) and  carbon (C). saturated fats are consist of double bond while unsaturated fat do not have double bonds.

Hence, the Hydrogenated vegetable oils will behave like d. Saturated Fats