2, 4, and 5 are your best options
It travels from the pancreas to the liver in the bloodstream.
It gets pressed down every time it is used
Answer:
Rusting is an oxidation reaction. The iron reacts with water and oxygen to form hydrated iron(III) oxide, which we see as rust. Iron and steel rust when they come into contact with water and oxygen – both are needed for rusting to occur.
