Defending in basketball isn't so much a skill, like shooting, or an art form, like ball handling. Defense is a combination of effort and instinct.
Some athleticism is involved, but more than anything, to play defense well requires a great deal of effort.
Instinct is the other part: Just being in the right place at the right time, getting a hand in a shooter's face and keeping a ball handler in front of you.
Great defenders come in all shapes and sizes. Small, quick, point guards who pester an opponent in the backcourt. Mammoth men who shut down anything around the basket. Long, athletic wing players who hassle everything on the perimeter.
Here are the 12 best defenders in college basketball in 2012.