Answer:
onion seller
Explanation:
In the given sentence, the word 'onion seller' will be used to complete the sentence. Â
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.