Margie recently suffered a stroke and now has paralysis in her right hand. if she wants to increase the likelihood that other areas of her brain will take over for the brain area previously allocated to her right hand, she might try to do exercise.

cardiovascular

Cardio exercise is any exercise that raises your heart rate. And we all know that to keep our muscles in shape we need move them. This movement makes them stronger and stronger muscles make for a more efficient and healthy body.

I believe the answer is: Cardiovascular 
Stroke could be caused by some sort of blockage that could bloke the normal blood flow that circulate to our brain, which causing the malfunction. Doing cardiovascular activities would help to remove this blockage and return the bloodflow into normal condition.