Identify the sentence that correctly uses the indefinite article.

The correct answer is 'Amateur' is a noun which refers to a person who takes part in an activity as a hobby or for pleasure and not as a job.

Key Points

From all the above options, option 1 is correct as in option 1  :

• There is correct use of punctuations.
• Sentence is grammatically correct.
• Sentence makes a sensible meaning.
• Use of articles is also correct ( Example - a person , an activity , a job )
• The tense of sentence is also correct.

Additional Information

•  Articles are used to modify nouns.
• There are 2 articles in English - a/an and the.
• The refers to specific or particular nouns

Example : The great wall of china, The church

• A/an modifies non-specific or non-specific nouns.

Example - an apple, a room