Question

this is the boy......works hard

Answer 1

Answer:

in the blank the answer is who

Answer 2

This is the boy Who works hard.

Detailed answer

The word who is the most appropriate word that can be used here as it signifies that a particular person is working hard

• The word "who" makes the sentence a proper sentence without any grammatical error.
• Any other word may make the sentence not grammatically right.
• For example, if we use the word "which" it makes it completely wrong as it doesn't signify anything
• The word "who" is usually used to convey a single person or a particular person.