Wayne had gone over and over the area with a big magnet to get the metal ( which could possibly puncture tires , right Kath ? ) out of there .
Why must the metal be taken out ?
Pick the best answer from the following options:
- None of the above choices .
 - It needed to be there .
 - It 's not causing any harm .
 - It 's dangerous to leave it there .


It 's dangerous to leave it there .