during which process is water produced?
alcohol fermentation
acetyl coa formation
electron transport chain
citric acid cycle

electron transport chain

Explanation:

The electron transport chain includes a series of membrane-embedded proteins that accept electrons from NADH and FADH2. The final electron acceptor in the series is oxygen (O2).  

Reduction of oxygen by electrons from NADH and FADH2 results in the formation of oxidized states of reducing powers (NAD + and FAD+). During the process, oxygen is reduced into a water molecule.  

because the asteroid belt is between the mars and jupiter orbits, it is around 2.2 to 3.2 astronomical units (au) from the sun – which is approximately 329,115,316 to 478,713,186 km. the average distance between objects is a massive 600,000 miles.

explanation:

the supermassive black hole is in the middle of the galaxy.