Question

what type of radiation does the stratosphere primarily shield earth from? visible light radio waves ultraviolet (uv) radiation

Explanation:

The stratosphere contains the ozone layer. Ozone molecules in the stratosphere absorb most of the Sun's harmful ultraviolet (UV) radiation. This is a key protective function of the stratosphere. Visible light is not harmful in the context of what the stratosphere shields against, and radio waves are not blocked by the stratosphere in a shielding - like protective manner.

Answer:

ultraviolet (UV) radiation