Final answer:
The flat curl is the type of pin curl that produces a tight, firm, and long-lasting curl, while allowing minimal mobility. The correct answer is 3.
Step-by-step explanation:
The type of pin curl that produces a tight, firm, long-lasting curl and allows minimum mobility is the flat curl. Flat curls, also known as pin curls, are created by pinning the hair close to the scalp in a circular pattern. Unlike spiral curls, which are more suitable for longer hair and provide a spiral shape, flat curls offer a tighter, closer wave, and hence, result in a firmer and more enduring curl. The hair is shaped into a curl, dried, and then carefully brushed out to achieve the desired style. This curling technique has been popular in various styles, especially those requiring defined and lasting curls. The correct answer is 3.