Based on brief stories used to call on the readers feelings
The answer is a. President.
The word President is the predicate nominative here, also known as predicate noun.
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.
The predicate nominative in the sentence is Pizza. because that is the word that is replacing the earlier mentioned noun, which was "food".
Answer: E. Emphasizes the mounting evidence for the complexity of the ocean’s currents
Explanation:
The author begins these sentences with “And below” to claim that beneath the surface currents there are other distinct currents with different speeds, directions, and volumes. By repeating “And below” at the beginning of the next sentence, the author suggests that there are yet other currents beneath these. The author’s arrangement of these sentences therefore suggests that the layers of distinct ocean currents are potentially endless. After making this suggestion, the author then includes the fact that there is photographic evidence supporting the idea that there are currents on the sea bottom, which had once been thought to be still. By arranging the sentences in this manner, the author affirms her claim regarding the unending complexity of the ocean’s current by revealing that there is already proof to support the claim.
