Subject: What affects the sun to increase solar activity in the 11 year cycle

I am doing some research on the Aurora Borealis for a school 
project.  
 
I understand that there is an 11-year peak cycle in solar 
activity and why this creates an increase in Aurora Borealis 
activity, but what I'm trying to find out is what is it that 
affects the sun to increase the solar or sun-spot activity?  

If you could answer this, I would be grateful.  Or if you know  
where else I might inquire?
 
Thank you for your time.
Niki Hurrle  ( dennishur@iquest.net )

Re: What affects the sun to increase solar activity in the 11 year cycle