True, lots of things are enjoyable once you like to do the activity
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There are two kinds of digestion: mechanical and chemical. Mechanical digestion involves physically breaking the food into smaller pieces. Mechanical digestion begins in the mouth as the food is chewed. Chemical digestion involves breaking down the food into simpler nutrients that can be used by the cells.
I would say, A. Endoscopy because, it is a tube that goes down the throat or the other way and looks through the digestive tract and the throat cavity.
