Question

1. what is the author’s purpose for writing \a scratch tells all\? a to encourage readers to take better care of their teeth by making it a daily priority b to inform readers about the effect tooth decay has on the overall health of an individual c to explain that the diet that resulted from farming has contributed to an increase in tooth decay d to explain the harmful effects of sugar on the human body, as well as its role in increasing tooth decay

Explanation:

To determine the author's purpose, we analyze each option:

• Option A focuses on encouraging dental care, but the title "A Scratch Tells All" doesn't imply a call to action for dental care.
• Option B is about tooth decay's effect on overall health, but the title suggests a focus on how a scratch (likely related to dental analysis) reveals info, not broad health effects.
• Option C: If the text discusses how farming - related diets increased tooth decay, and "A Scratch Tells All" refers to analyzing teeth (like scratches on teeth) to show this dietary - decay link, this fits. It explains the connection between farming - derived diets and increased tooth decay.
• Option D focuses on sugar's effects, but the title doesn't hint at sugar as the main topic.

Answer:

C. to explain that the diet that resulted from farming has contributed to an increase in tooth decay