Flossing stops tooth decay.
Meaning: This sentence is saying that flossing helps to prevent tooth decay. When you floss, you are removing plaque and bacteria that can cause cavities.
Choice of Words: Flossing is the act of cleaning between your teeth with a thin string. Stops means to make something stop happening. Tooth is one of the hard white things in your mouth that you use to bite and chew food. Decay means the process of something rotting or breaking down. When you put them together, "Flossing stops tooth decay" means that flossing helps to prevent your teeth from rotting or breaking down.
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