Final answer:
Ultraviolet radiation and electrical discharges in storms were the energy source that possibly created the building blocks of life on Earth during the early parts of its creation.
Step-by-step explanation:
During the early parts of the creation of life on Earth, the energy source that possibly created the building blocks of life was ultraviolet (UV) radiation and electrical discharges in storms. These energy-containing chemical compounds formed amino acids, proteins, and other organic molecules that are necessary for life. Although the amount of energy from these sources was limited, it was enough to facilitate the formation of the basic building blocks of life.