The person to whom i owe the biggest gratitude is my papaw.
a. which part of the above sentence is the relative clause?
b. the person to whom i owe the biggest gratitude
c. is my papaw
d. no relative clause found '

"(The person) to whom I owe the biggest gratitude" is the relative clause.

Relative clauses are used to attach an information onto someone or something. In other words, they tell us something in relation to a subject, hence the term "relative clause."

They are introduced by relative pronouns, such as:

In this sentence, the clause "to whom I owe the biggest gratitude" gives an information about "my Papaw."

um, what am i suppose to answer here? it just said that he will studied hared because of a grade in spanish.