Answer: d.
Explanation: In this excerpt from the introductory note of "The Autobiography of Benjamin Franklin", a key detail about Franklin's employment in the excerpt is <u><em>Benjamin Franklin worked at the "New England Courant." </em></u>This was one of the first American newspapers. It was founded by James Franklin, Benjamin's brother. Benjamin did many jobs there. He also wrote articles. The newspaper was a success.
The correct answer should be additionally.
The word additionally would provide the best transition between these two sentence. It is so because you have one idea in the first sentence, and then you want to show another idea very similar to the first one in the second sentence. Using additionally to convey that is the way to go.
You can re-arrange your sentence in this way:
In order to identify the development of tornadoes, few required conditions can be described.
The complete predicate of a sentence tells what the subject does or is. It includes a verb and all other details that describe what is going on. example: My father fixed the dryer. The simple predicate is the main verb in the predicate that tells what the subject does. Therefore, the simple predicate is learned. I hope that this is the answer that you were looking for and it has helped you.