Question

Which word in the sentence is the predicate adjective?

Despite great hardships, the explorers remained true to their goal.

A.
great

B.
despite

C.
their

D.
true

Answer 1

A.
great

The sentence above displays a passive voice, wherein the sentence connotes the form, "Despite great hardships, the explorers remained true to their goal."

Predicate Adjective 
Predicate adjective are adjectives in the predicate position. Like, she is pretty. Pretty is the predicate adjective.

Answer 2

I think it's option A.