I think it energy usage because whenever you have cholera you don't have energy you are week.
Answer: A steam engine is an external combustion engine (ECE) in which the fuel is combusted outside of the engine, unlike an internal combustion engine (ICE) in which fuel is combusted inside the engine. ECEs have a lower thermal efficiency, but carbon monoxide production is more readily regulated.
Mental physiciality .its like a movie that plays in your head over and over once you see something it tranfers to the brain.
It's a catalytic converter
Is their a multiple choice ?