Final answer:
The subject of this question is Health. Nails having wavy ridges are a common nail condition known as onychorrhexis. Using a slightly wet buffer and a small amount of polish can help smooth out the ridges and improve the appearance of the nails.
Step-by-step explanation:
The subject of this question is Health. Nails having wavy ridges are a common nail condition known as onychorrhexis. Onychorrhexis can be caused by a variety of factors, such as aging, nutritional deficiencies, hormonal imbalances, or certain medical conditions. Using a slightly wet buffer and a small amount of polish can help smooth out the ridges and improve the appearance of the nails.