In English, there are two types of articles: The definite article which it's "the" and may be used with singular or plural noun, and the Indefinite articles which are "a" and "an" that may be used with a singular noun.
The indefinite articles mean the same, their difference lies in when to use them: When the article is before a word that begins with a consonant sound, "a" is used, and when the article is before a word that begins with a vowel sound, "an" is used (Such as it is used in the sentence: "an unusual and beautiful gift".
<span>At
the art fair, he bought an unusual and beautiful gift for his
aunt.
Which word is the indefinite article?</span>
Answer:
The word that is the indefinite article in the sentence shown above
is An. This is due to the fact that there are two indefinite articles
in English which are a and an. In this sentence “an unusual and
beautiful gift” is where we can find the indefinite article.