What is an enamel? i need help?!

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If your enamel is weak you probably have pain when eating or drinking foods or drinks that are cold. The enamel is the white part of your teeth. It is the hardest substance in the human body. It protects your teeth. If you want to preserve your enamel don't drink or eat things that are acidic, i.e. oranges, apples, lemons, etc.

first of all, your grammar is sort of off. Its enamel. not "an enamel" , lol.
and its just the layer in front of your teeth that help prevent cavities and stuff. It gets eroded but foods and stuff with high acidic levels and im sure other stuff too? haha okay, well now you know. hope i at least gave you some sort of understanding (:

It is the layer on your teeth (naturally there so dont try to remove it) that protects your teeth.