The given statement is an example of a phrase, specifically, a participial phrase. The element that is necessary to complete the sentence is an independent clause. A participial phrase consists of words with the -ing or -en form plus its modifiers. This kind of phrase always functions as an adjective. The phrase "Beginning in the fall of 1957" is describing a certain noun, which is found in the independent clause.
Dear (said friend),
Hey, I hope your well, I know we haven't talked in a while so im sending his letter to "break the ice". I also wanted to tell you that I got a scholarship and im going to be doing study abroad in Paris! Im actually on the plane while im writing this so by the time you get this ill be sending you another postcard/letter of all the wonderful things im going to see and explore. Well I have to get off my plane now but let me know how youve been. Miss ya.
from (your name here)
Negative twelve because it’s below the surface of the ocean
Answer:
D. Fossils of early tetrapods have many features that are very different than whales of today
Explanation:
I would say this is the correct answer because it pertains to the fossil record providing proof that the tetrapods evolved from whales. This explains why they are very different than whales nowadays despite the fact that they have a shared ancestor. The answer you have chosen is too vague.