If you push two positive charges closer together, it needs you to do 'work' and that stores energy.
At the moment I can't think of an application of this, and I'd think it unlikely to come up in a question.
The 'stores and pathways' story of energy works best when you can do calculations and measure the energy flows.
It's quite a new approach (err - actually it's been around for some years, but not popular), so there won't be much on the internet / books.