Answer :
Answer:
onion seller
Explanation:
In the given sentence, the word 'onion seller' will be used to complete the sentence.
Here 'onion seller' is the noun. It is the common noun. Common nouns used in the middle of the sentences do not begin with capital letter. A proper noun is written with the first letter in capital. A proper noun is a word that is used specifically for particular name, place or person.