Final answer:
Option (D), Nucleic acid is the bio-molecule that the body never breaks down for energy, as it serves the crucial roles of storing and transmitting genetic information.
Step-by-step explanation:
The bio-molecule that is NEVER broken down by the body for energy is D) Nucleic acid. While the body can use proteins, carbohydrates, and lipids for energy, nucleic acids such as DNA and RNA are not used as an energy source. Instead, nucleic acids are essential for storing and transmitting genetic information. The body avoids using them for energy to protect the integrity of these crucial molecules.