Final answer:
The most suitable method for waving long hair is either temporary waving with water molecules or a permanent waving technique using chemicals to reform disulfide bonds for a lasting wave.
Step-by-step explanation:
The most appropriate method for creating waves in long hair during the waving process is the use of either temporary or permanent waving techniques. For temporary waving, water molecules disrupt some of the hydrogen bonds in the hair. As the hair dries, new hydrogen bonds form and help to maintain the new curled shape for a time.
For a more long-lasting solution, permanent waving, or perms, utilize thermal or chemical means to disrupt and reform the disulfide bonds within the hair strands. Chemicals are applied to the hair which is then wrapped around forms to produce the desired curl or wave, making the change more durable compared to a temporary wave.