Question

light will be produced when
○ electrons absorb energy as they move to an excited state.
○ electrons release energy as they move to an excited state.
○ electrons absorb energy as they return to the ground state.
○ electrons release energy as they return to the ground state.

Explanation:

When electrons return from an excited state to the ground - state, they release energy in the form of photons, which is light. Electrons absorb energy to move to an excited state, not release it while moving to an excited state. And they don't absorb energy while returning to the ground - state.

Answer:

electrons release energy as they return to the ground state.