A, the passage mainly focuses on the theories and mechanisms of yawning
A. Gathering information before you begin working helps answer any questions you may have when you are working. Also, it helps explain what things are, how they work, how to use them, etc. It all depends on your research.
I hope this helps:)
Answer: it is the second option.
Waiting for the sunrise. You really feel an appreciation for the beauty of nature.
