How does the change in the temperature relate to the volume of gas in the balloon?

As temperature increases, atoms begin to move faster and farther away from the point where they started. They begin to move more and in a larger area. Because of this, the volume of the gas in the balloon will increase as well. It will take up more space and will therefore increase in volume.

Increase: Atoms separate into more space. (When induced with heat)

Decreases: They get closer together. (When head is released) 

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.