Q: In some parts of the world, too much of the sun's harmful uv radiation gets through because of a hole in what layer?


Read this paragraph and choose the correct option from the provided answers:

Punta Arenas, Chile is the world's most southern city. At such a high latitude, winters are exceedingly cold and dark. Unlike the children pictured above, the children in Punta Arenas must stay inside to avoid the cold. Of course, they look forward to spring when they can go out to play. But some years, it is too dangerous for the children to go outside. The ozone hole has moved north. Too much of the Sun's harmful UV radiation gets through.

 Choices:

- mesosphere

- troposphere

- thermosphere

- ozone


A:
ozone