Her political activism throws the apathy of others into sharp 'relief'. [=makes the apathy of others very noticeable]
His character provides a little 'comic relief' in what is otherwise a very serious and dramatic movie.
Just one day of sunshine would be a welcome 'relief' from the rainy weather we've been having lately.
(..) This potion might paralyze me. I may risk to get what I'm here. I'd cause me so much pain that I'd beg for relief. You are not to indulge these requests. It's your job, Harry, to make sure I keep drinking this potion. Even if you have (..)2009 Harry Potter and the Half-Blood Prince