Q: How many oxygen ions make up an ozone molecule?


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

Oxygen is needed to make ozone. Ozone is a molecule made of three oxygen ions. Ozone in the upper atmosphere blocks harmful solar radiation from reaching the surface. Without oxygen, life on Earth would have been very simple.

 Choices:

- eight

- one

- five

- three


A:
three