Which oils produce an expectorant effect?

The correct choice is Eucalyptus and benzoin, as both of these essential oils are known for their expectorant properties. Eucalyptus oil contains compounds such as eucalyptol, which can help to clear mucus from the lungs and facilitate easier breathing by loosening phlegm. This makes it particularly effective in treating respiratory conditions where a buildup of mucus is present. Benzoin, on the other hand, while primarily recognized for its warming and soothing qualities, also supports the respiratory system by helping to relieve coughs and congestion.

In the context of aromatherapy and respiratory health, using these oils can prompt the body to expel mucus more effectively, thereby providing relief from congestion and enhancing respiratory function. This is why eucalyptus and benzoin are often chosen in formulations aimed at alleviating symptoms of colds and respiratory infections.

The other oils listed have their own benefits, but they do not specifically provide the same expectorant effect as eucalyptus and benzoin. For example, lemon is often used for its uplifting and cleansing properties, while lavender is prized for its calming effects and promoting relaxation. Rosemary is known to invigorate and stimulate, but does not have the specific expectorant properties of eucalyptus. Chamomile is typically recognized for its anti-inflammatory and soothing