Selected radio button shows user more content

I tried to search info for my question but I didn't found it. I think I just can't find right search words because this doesn't feel to be very rare case. If you have topics about this I would like to check it.

Case example: User can choose one option out of 3 options. At least one of the options provide more content related to selected option.

Where this new content should be shown and why? How would this type of situtation done so it's accessible?

I made this sketch to make my question more clear.

• Example 1 shows new content between radio buttons
• Example 2 shows new content under the radio buttons