Question

what does uva contribute to, besides immediate tanning? nail strength and density hair growth and color skin aging and wrinkling

Explanation:

UVA rays penetrate deep into the skin. They cause oxidative stress, which damages collagen and elastin fibers. This damage leads to skin aging and wrinkling over time. Nail strength/density and hair growth/color are not significantly affected by UVA in the context of its main impacts on the skin.

Answer:

skin aging and wrinkling