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.

The answer would be semen as a whole but the cells contained are called sperm and they fertilize the eggi hope this