Hello. You did not enter the text to which this question refers, which makes it very difficult to answer it exactly. However, I will try to help you in the best possible way.
As you showed that the word "author" in line 10 was used as a proper noun, we can consider that the same word in line 4 was used in a general way and did not specify an exact person. This is because proper nouns are terms used to specify something or someone, as the question states that the word "author" was not used with the same meaning in line 4, we can consider that this is the difference.
All could be said but specifically F or/and D the most likely is F though
The correct answer is true.
It is true that Sir Isaac Newton not only described the law of gravity, but he also discovered a mathematical relationship to measure the force of gravity between any two objects.
It is well known that Isaac Newton was a man ahead of his time. He had a brilliant mathematician mind and could compare the acceleration of the moon with the acceleration of things on our planet. He discovered the dependence of gravity upon the distance of different objects.
It all started with the fall of an apple from the tree and ended up as the Isaac Newton Law of Universal Gravitation.
It's d. ENIACE, baby boom
Answer: the Buffalo Soldiers comprised of former slaves, freemen and Black Civil War soldiers, were the first to serve during peacetime.
Explanation: