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Answer:
In English there are three articles: a, an, and the. The definite article (the) is used before a noun to indicate that the identity of the noun is known to the reader. The indefinite article (a, an) is used before a noun that is general or when its identity is not known
the word a or an used in English to refer to a person or thing that is not identified or specified In "I gave a book to the boy" the word "a" is an indefinite article and the word "the" is a definite article.Hope this helps!