The group of words that will describe the subject.
A predicate noun is a word which renames the noun that has been mentioned in the sentence. In this case Franklin Roosevelt is the noun that has been renamed as "President", which makes it the answer to the question.
Another example in : My brother's favourite food is pizza.
<span>The predicate nominative in the sentence is Pizza. because that is the word that is replacing the earlier mentioned noun, which was "food". </span>
<span>The basis of American society has always been the individual and political rights and ideals of freedom and equality.</span>
A) varied
Varied/variety means there's many, which is said in the next sentence.
Animals being in captivity is bad for their instincts. In captivity, animals lose their more wild side that's in touch with their original and natural environment. Unless an animal (specifically whales in this case) is injured and cannot be in the wild, they should not be kept in captivity.
