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Which of the following requires the use of a stove to heat?

  1. Electric curling iron

  2. Flat iron

  3. Conventional (Marcel) iron

  4. Infrared hair dryer

The correct answer is: Conventional (Marcel) iron

The conventional (or Marcel) iron is a traditional styling tool that requires a direct heat source, typically a stove, to reach the necessary temperatures for curling hair. This type of iron consists of two metal arms that are heated and used to create curls by applying heat and pressure to the hair. Unlike electric curling irons or flat irons, which have built-in heating elements and can be plugged into electrical outlets, the Marcel iron depends on an external heat source for its operation. Therefore, it is the only option listed that necessitates the use of a stove to achieve the desired styling results.