Which of the following is important in maintaining skin health while tanning?

Maintaining skin health while tanning is crucial, and regular hydration and skincare play a significant role in this process. Tanning, whether done artificially or through sun exposure, can lead to dehydration and damage to the skin if not managed properly. Hydration helps maintain the skin's elasticity and appearance, preventing dryness and flakiness that can result from the tanning process. Additionally, using moisturizers and skincare products designed for tanned skin can help maintain its health, support the tanning process, and prolong the tan’s longevity.

The other choices do not provide comprehensive skin health benefits. Using tanning oil might provide some moisture, but it is not sufficient on its own for overall skin care. Avoiding outdoor activity does not contribute to skin health and can lead to a lack of Vitamin D, which is essential for skin function. Lastly, using hot water immediately after tanning can strip the skin of moisture and may irritate freshly tanned skin, which is counterproductive to maintaining skin health.