Why do mosses need water for fertilization

Becasue they need to stay hydrated so they won't dry out or die.

Mosses are types of bryophytes, meaning they’re a part of a group of plants that NEED moist environments to reproduce. This is because their flagellated (whip like moving) sperm must swim through water to reach the egg.

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.