Final answer:
When you go to a salon, you ask for a hair straightening treatment to make your hair straight. It is different from ironing your hair.
Step-by-step explanation:
When you go to a salon and want to make your hair straight, you usually ask for a hair straightening treatment. This involves using heat or chemicals to make the hair smooth and remove any curls or waves. It is different from ironing your hair, which refers to using a flat iron or hair straightener to temporarily straighten the hair.