Respuesta :

Answer:

A. Electron clouds or energy levels

Explanation:

Electrons can exist in two states:

  • Stablized in electronic orbitals
  • Freely moving

Electrons can exist in an electron cloud or energy level. Electron in an atoms have ability to change energy levels either by emitting or absorbing a photon that form the energy equal to the energy difference between the two levels.

Hence, the correct answer is A.