Luca wants to identify and quantify the chemicals causing air pollution in a city, but he is using a manual air sampler to collect air samples. Why should he update his current sampler to an electronic one?

to maintain the current way air sampling data are stored
to diagram exactly what portions of the city are affected by air pollution
to make predictions about air pollution that are precise but not accurate
to account for broad-scale factors that affect the number of chemicals identified

to account for broad-scale factors that affect the number of chemicals identified

Explanation:

idk srry

explanation:

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.)