These types of building blocks are an energy source.
a. fats
b. water
c. vitamins
d. minerals

A. Fats would be the correct answer. For an organism to have energy, fats are burned when the cell diet does not consist of the fat needed from the food intake. Fats are necessary in order to transport other nutrients. Some vitamins are even fat soluble which means they need fats in order to be transported. Such vitamins are A, D, E, and K. Fats also provide protection for the vital organs from pressure and change in temperature by providing proper insulation and cushion. It also helps regulate body temperature.

Ithink a saturated phospholipid

Glucose, also called grape sugar, blood sugar or corn sugar, is among the simplest and one of the primary naturally occurring sugars. produced naturally by plants as the primary photosynthesis product, it is heavily used by living beings as a main energy source and is necessary for cellular respiration. chemically, it is a monosaccharide carbohydrate and serves as a building block for complex sugars like starch.