The Andes Mountains are located down the west side of South America and are the longest chain of mountains in the world. The Andes start at the top of South America and go along the
coast to the bottom of South America, which spans over 400 miles. There are a lot of volcanoes
found in the mountains and many are active. Like California earthquakes are a normal
occurrence and have killed many people.
The reason the author wrote the selection is
a to inform 're reader how dangerous California can be
b. to show the similarities between South America and San Francisco
c. to describe the Andes Mountains
to inform the reader that earthukes kill people

The reason the author wrote the selection is  c. to describe the Andes Mountains .

Explanation:

The given passage contains a description of the Andes Mountains of South America. It details its location, which ranges from "the top of South America and go along the coast to the bottom of South America".

This mountain range that "spans over 400 miles" also has "lots of volcanoes" that are active and pose a hazard to the people living near and around it. Moreover, it also is in an earthquake zone like California and has led to the deaths of many people.

The reason the author wrote this selection/ passage is to inform the readers about Andes Mountain and give a description of it.

Thus, the correct answer is option c.

the sentence that best describes the tone of the passage from the radio broadcast compared to the passage from the book is b. the radio broadcast has a more surprised tone.

consider the text evidence: in the passage from the book, the description is more matter-of-fact. it is simply describing the things resembling little grey snakes, but there is no urgency in the description. on the other hand, in the passage from the radio broadcast, there is definetely urgency (you can tell from the expression used, "good heavens", which clearly indicates surprise.)