OH- and H+ , and let's not forget H3O^+
They ensure they leave the system and they also ensure that people get the nutrients they need.
Oxygen is a vital element within cellular respiration. An intrinsic part of the cellular respiration cycle is the transfer or electrons through the electron transport chain, and at the end of it exists the mitochondria, in which electrons are donated to the Oxygen and combine with hydrogen ions to form water.
Answer:
Because Without Earthquake Research Earth Will Be DESTROYED