Classify the following items based on the type of polymer they are made from: raincoats and leather shoes.
a. both are made from synthetic polymers.
b. leather shoes are made from natural polymers; raincoats are made from synthetic polymers.
c. leather shoes are made from synthetic polymers; whereas raincoats are made from natural polymers.

How is electrolysis most commonly used to produce an energy source? a - splitting water molecules produces oxygen, which organisms breathe to fuel their bodies. b - splitting water molecules produces hydrogen gas, which is used to power machines through hydrogen fuel cells. c - splitting carbon dioxide molecules produces coal, a form of carbon that can be burned to produce heat. d - splitting carbon dioxide molecules produces natural gas, which can be burned to generate electricity in power plants.