I believe the answer is C. but correct me if i’m wrong
<span>People with a casual interest in astronomy is the audience of the book by Ball. This is because the book is all about Great Astronomers. This book can inspire people who wants to discover things about astronomy and those people who want to become one in the future.</span>
Answer:
<h3>how the discovery of gravity by Isaac Newton has changed the whole idea about Earth and the planets.</h3>
Explanation:
The idea of the whole text is to let the readers understand how the discovery of gravity by Isaac Newton has changed the understanding about Earth and the planets.
It was a breakthrough discovery in science which helped in understanding the physics of how Earth and heaven (heavenly bodies) worked.
Therefore, this sentence contain the central idea of the whole text as it states how the discovery of gravity has connected the physics between Earth and other heavenly bodies.