Question

Which word in the sentence does the predicate nominative rename?

Stella is the youngest daughter in the family on your mom's side.

A.
Stella

B.
mom's

C.
daughter

D.
family

Answer 1

there are three parts of a sentence. 
subject   verb  and  predicate.
↑                  ↑                        ↑
the sky       is                      blue.
so, the answer would be A. stella

Answer 2

your answer would be a)stella