Besides strength, what is the advantage of using a heavy-duty hook and eye?

A hook and eye is used as an out-of-sight closure on garments. Heavy-duty hook and eyes are used on the waistband of men's trousers. This closure lays flat and provides a strong secure hold.

two factors or characteristics of a chapter that might make it difficult to read would be words i don't understand, or if i don't fully understand what's going on in the chapter. strategies i can use to get through the difficult material would be a dictionary, and re-reading previous chapters to get a better grasp of what the author is trying to say.