Background in row block

Hi guys,

I have a question, I looked from many places, but I can’t found.

I imported tag div theme Animals Pro (https://demo.tagdiv.com/newspaper_animals_pro/) with content.

And I couldn’t find where I change the background of each row session on the homepage.
I found “fixed background image” option, but I couldn’t find where I can change the background image for each row.

And if I uncheck the “fixed background image” option, where are the images fetched from?

It’s not an error, and it’s probably something simple, but I couldn’t find it.

Thank you for your support!