Question

Fill in the blank with an appropriate article:
The sun is __ star
A) A
B) An
C) The
D) No article

Answer 1

Hint: There are two types of articles in English. The types are definite and indefinite articles. Definite articles are used when the noun described has a well-known identity or is unique. An example of a definite article is “the”. Indefinite articles are used when the noun is singular or is countable. Examples of indefinite articles are “a” and “an”.

Complete answer:
“A” is an indefinite article and is used before indefinite or unspecific nouns. And the noun words begin with a consonant. Since here the usage star begins with a consonant letter and is unspecific in nature or is not a unique one, “a star” is the most appropriate usage.
Considering the other options:
“An” is also an indefinite article, which is used before any unspecific or indefinite nouns, which can be a person or a thing. It is used before nouns which start with a vowel that is with any of the letters a, e, I, o, and u. Since in the above sentence, the usage “star” doesn’t begin with a vowel. Even though it is unspecific in nature, the indefinite article “an” cannot be used here.
“The” is a definite article, and is used before any noun which is unique and specific, it is mainly used in front of any famous monuments or places. Since the usage of “star” is not specific in nature and also Sun is not the only star present and is ambiguous and general, a definite article such as “the” cannot be used.
Since an article should be used in front of the usage and is grammatically incorrect not to use it, no article is also an incorrect option.
Thus from the above options given, the most appropriate and correct option is A. Thus the complete sentence is, “The sun is a star.”

Note:
Any famous monument or a place, anything having a unique character has a definite article “the” used in front of it. In the above sentence, since Sun is a unique star, thus the article “the” is used before Sun, as “the Sun”. There are only three articles, that is a, an and the.