Which word in the sentence is the predicate nominative?

A horned toad is a lizard with a flattened shape and short snout.

A.

shape

B.

snout

C.

toad

D.

lizard

A predicate nominative is defined as a noun that completes a linking verb and also renames the subject. In the given sentence above, the subject is the "horned toad", the linking verb is "is", and the word that renames the subject is the word "lizard". Therefore, the correct answer is option D.