Books that are surrounded by oxygen will turn yellow, so basically, all books since oxygen is constantly surrounding us. Oxygen-rich conditions are very bad for paper, which gives them the yellow tiny. This is actually called lignin oxidation! Lignin oxidation gives it a yellow or brown colour as you said. Yellow comes first, then brown after.
I hope this helped a bit! :)
1. Abundant > Generous
2. Healthy & Vigorous > Energetic
3. Absorbed > Focused
4. Timid > Nervous
5. Wary & Timid > Cautious
6. Vigorous > Lively
7. Tense > B nervous, unable to relax
8. Previous > Earlier
9. Abundant > Ample Amount
Good luck! :)
I think the answer is C)Herbs can provide positive medicinal effect if used properly.
C is the best answer because
Herbs don't have curing power, they can help you feel better, but they don't have curing powers. This is why A is not the best answer.
Herbs may be plants filled vitamins and minerals but that is not that does not really support the author's viewpoint regarding the value of herbal healers.
So C would be the best choice. Herbs can provide positive medicinal effects if used properly, and this goes along with the authors views of herbal healers.
Try closing the app and re opening