how glues work ,need serious help,please

[romso]

how do glues work ? are there different types of glues? is the bond chemical or physical ? what are some of the most common components of glues ? research their story.

it would be relly nice if somebody could help me with this topic , i need to write at least 5 pages single space about this , and it is so hard to find something .

thanks to everybody who is helping me