Which appliance uses two heated plates to straighten and smooth hair?

• A. Flat iron
• B. Curling wand
• C. Hair dryer
• D. Hot comb

Answer: (A)

The appliance being described is the tool that uses two heated plates to straighten and smooth hair. It works by clamping a strand of hair between the two hot plates and gliding the tool down the hair, pressing and heating it to flatten and align the cuticle for a straight, sleek look. The plate surfaces (often ceramic, tourmaline, or titanium) help distribute heat and reduce frizz, making the straightening process more efficient.

A curling wand, by contrast, has a heated barrel used to wrap and curl hair, not to press it flat between two plates. A hair dryer dries and can smooth with attachments but does not use two heated plates. A hot comb is a heated comb used to press hair, but it’s not two flat plates—it's a single comb rather than a clamping two-plate system.