If decomposers were added to an energy pyramid that contains producers, primary consumers, and secondary consumers, which trophic level or levels would be affected?

All would be affected because decomposers like to break down dead things meaning dead plants AND animals

When you are making a guess you are forming a hypothesis

Mitochondria is the cell organelle that produced the energy that is needed in the body system in form of atp, that is why it is called the power house of the cell. energy is needed by the living organisms to carry out the activities which sustain life.  if the mitochondria is destroyed atp will not be produced. if the mitochondria is destroyed, energy production will stop and the affected living organism will not have the energy to carry out the necessary life processes; this will lead to the death of the organism.