Reports are characterized by four qualities:1. they contain a systematic record of a particular technical study2. they are usually written for others to read, 3. they solve a problem, 4. they share good news.

(1) they contain a systematic record of a particular technical study

Explanation:

the answer is allusion. give me brainliest

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.)