Screen Reader not reading the text that is being displayed on click

Hi everyone, 

I am trying to create an accessible version of a slide:

https://360.articulate.com/review/content/386e6d18-bd2d-4038-870a-0148565f222c/review (Links to an external site.)

It is a simple click-and-reveal activity. I added Alt text, reviewed and adjusted the focus order and used NVDA screen reader. The screen reader is not reading the text that is being displayed on click. I am not sure how to set this up. I am attaching the focus order of the slide here, please let me know what am I doing wrong. 

Thanks,

Tanaya