Final answer:
The style described, involving hair twisted into knots and secured with pins or bands, is known as A) Bantu knots. Temporarily altering hair involves disrupting hydrogen bonds in keratin.
Step-by-step explanation:
The style in question, where the hair is double-strand twisted or coil twisted and then wrapped around itself to form a knot, is called Bantu knots. These knots are often secured in place with bobby pins or elastic bands. Temporary hairstyling methods can alter the structure of hair temporarily, as water molecules can disrupt the hydrogen bonds in the hair's keratin strands, allowing it to take a new shape as it dries. While the question relates to a particular hairstyle, it's interesting to note the parallel between temporary hair reshaping and the manipulation of protein structures in the biological realm.