Essential oils are usually obtained using

Essential oils are typically extracted from plant materials. One of the most common methods for extracting essential oils is steam distillation. In this process, steam is passed through the plant material, causing the essential oils to evaporate. The steam carrying the essential oils is then condensed, resulting in the separation of the essential oil from the water. This method is preferred because it is gentle and does not involve harsh chemicals, making it suitable for producing high-quality essential oils.
Option B: Extractive distillation involves using a solvent to enhance the separation of components in a mixture, but it is not commonly used for extracting essential oils.
Option C: Solvent extraction involves using a solvent to dissolve the essential oils from the plant material. However, this method is less commonly used for extracting essential oils compared to steam distillation.
Option D: Leaching involves extracting compounds from solid materials using a solvent, but it is not typically used for extracting essential oils from plant materials.