Final answer:
When an atom's orbital with one electron combines with another atom's orbital that also contains one electron, it produces a bonding orbital containing two electrons, a covalent bond, and a molecule.
Step-by-step explanation:
When an atom's orbital with one electron combines with another atom's orbital that also contains one electron, the result is a bonding orbital containing two electrons. This occurs through the formation of a covalent bond. The combination of the two orbitals creates a molecule. Therefore, the correct answer is Response e, bonding orbital containing two electrons, covalent bond, and a molecule.