A puzzle for beginners

Hi! My name is Lauren Goodkind and I’m a respected  chess coach and chess YouTuber based in California: 

https://www.youtube.com/channel/UCP5SPSG_sWSYPjqJYMNwL_Q.  I love helping beginners get better.  Therefore, I created a puzzle for beginners below. Enjoy solving!  

What's white's best move here? Scroll down for answer.  

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Answer: The white queen can safely capture black's rook on a8 since the white bishop on g2 is protecting white's queen.  Look at all your pieces before you make a move!  

Who to move?

White

How do U know?

I cant see her description

Test to mark the text if its invisable to you. For me the text is black to an lighter black background. So its hard to read but atleast its possible to read. 

Qxa8 Qxa8 Bxa8

There is another indication whose move it is: If the thing is made right, it´s always the color who is down the board.