Iam stuck on this question. "viruses are considered to be which of the following? " (this is multiple choice)

Viruses are actually smaller than bacteria but they're not bacteria. So D is wrong.

Viruses don't grow and aren't made of cells, and despite being able to reproduce, they're not living. So C is correct.

As for the other two, I'm not entirely sure what they mean but C is the answer.

Viruses are non-living organisms. They attack host cells to live 

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.