In which sentence is the underlined word or group of words would a predicate nominative a. jonas edward salk became *famous* for developing a polio vaccine. b. in the 1940s, polio was *widespread*. c. polio is a contagious *disease* that has mostly been eradicated.

The correct answer is option C. Polio is a contagious *disease* that has mostly been eradicated.

Explanation:

A predicate nominative, also known as predicate noun, is always a noun or pronoun that renames the subject and complete a linking verb.  

Bearing the above in mind, it could be said that from the options provided, the option C. Polio is a contagious *disease* that has mostly been eradicated is the one that includes a predicate nominative (disease in this case).

because they are eaten by the frog and the frog getseaten by the snake and the snake by the eagle

since there are no options posted i'll give you a few examples.

a dolphin's flipper, bird's wing, cat's leg.