Name a natural remedy that can help alleviate nausea.

Peppermint is recognized as an effective natural remedy for alleviating nausea. It contains compounds such as menthol, which has a soothing effect on the stomach and can help alleviate feelings of queasiness. Peppermint oil is often used in aromatherapy and can also be consumed as tea or in capsules to provide relief.

While the other options, like ginger, mint, and lemon, also have properties that may help with nausea, peppermint's specific effects on the gastrointestinal tract make it particularly noteworthy. Ginger is well-known for its anti-nausea benefits, especially in pregnancy and motion sickness, but peppermint stands out for its immediate calming effect on the stomach. Mint can refer to various types of mint, which may include peppermint but is less specific, and lemon can help by providing fresh scents and tastes that can uplift spirits, but it may not be as direct in its nausea-relieving properties as peppermint. Thus, the effectiveness of peppermint in combating nausea makes it the correct answer in this context.