An adjective clause is a group of words that contain a subject and a verb, and it functions as an adjective by giving more information about a noun in the sentence. It usually starts with relative pronouns like 'who', 'which', 'that', 'whom', or 'whose'. Here are suitable adjective clauses for the given sentences:
The book belongs to my friend who is a talented writer .
Tell me the place where you found it .
The boy who is wearing a red shirt is jumping with joy.
People who live in glass houses should not throw stones at others.
The trains that travel through the mountains get delayed because of fog.
The luxury bus that we took on holiday carried twenty passengers.
The house that has a red door belongs to me.
The student whose father is a doctor came here.
Each adjective clause provides additional information about the noun preceding it, making the sentence more informative and descriptive.