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! :)
Mostly kinetic messt when all the oeoolle are likey to be
To actually make sure they are doing anything, and that they see that they are making progress
Answer:
Reading can help you remember more material, comprehension is also an important life skill that you need to use almost everywhere. Also, reading is fun, finding new words and phrases expands your vocabulary, and mind in general. Reading helps with thinking in a more logical or imaginative way (depending on what material you read).
Hope it helps.