Why is it that the byzantine empire had a healthy money economy, while in western europe the use of money declined

The Byzantine had a good harbor that was hard to infiltrate. Also, they were a hub of trading.

the of atp are the key to its ability to store and supply energy;

phosphate

the phosphate groups of atp are the key to its ability to store and supply energy. atp releases energy when it breaks bonds between its phosphate groups.

sense of self-interest