Many chemical reactions in cells take place on enzymes. the reactants bind to the enzyme until the reaction is complete. these reactants are called substrates. when the reaction is complete, the products are released.

Abay where the river empties into the sea

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.

C) reflection (i also looked up the other choices just to make sure)