Maria is a person whose family owns a cattle farm. Here 'whose family owns a cattle farm' is?
Maria is a person whose family owns a cattle farm. Here 'whose family owns a cattle farm' is?
Explanation
"Whose family owns a cattle farm" gives more information about "Maria" and begins with the relative pronoun "whose."
It is a relative clause because it modifies a noun and connects to it using a relative pronoun.