Why Ron is selected as Prefect.

[vmonte]

No: HPFGUIDX 97642

I think that DD makes Ron a Prefect because up to this point in the 
series he has really taken a back seat to Harry. (Harry also realizes 
that he should not feel jealous towards Ron because this is the first 
time Ron has ever received  recognition. I love that Harry notices 
Ron gingerly wrapping his badge before placing it in his trunk. 
Whether Ron admits it or not, he is proud of the recognition.) 

Ron needs to learn how to become a leader (if you believe in the 
chess game theory). The Prefect badge was given to give him 
confidence -- to make him feel good about himself.  Besides, it seems 
as though Prefects pay closer attention to their surroundings (I 
guess because their job is to keep order) more than your average 
student needs to.  Ron may start to piece things together while he is 
out patrolling the school grounds.  (I'm reminded of how Percy was 
always wandering the halls of the school.)