Answer:
Mitochondria
Step-by-step explanation:
The mitochondria make water through a series of chemical reactions that occur during cellular respiration. These reactions involve the breakdown of glucose and oxygen to produce energy in the form of ATP, as well as the release of carbon dioxide and water as waste products.
Specifically, during the electron transport chain phase of cellular respiration, electrons are passed down a series of protein complexes in the inner mitochondrial membrane, releasing energy that is used to pump protons (H+) across the membrane and into the intermembrane space. As the proton concentration builds up in the intermembrane space, it creates a gradient that drives the synthesis of ATP by the enzyme ATP synthase.
At the end of the electron transport chain, the electrons combine with oxygen (O2), which serves as the final electron acceptor. This reaction combines with hydrogen ions (H+) from the electron transport chain to form water (H2O), which is then released as a waste product from the cell.