Clunking Sound on mitsubishi galant 2007
 

I have a Galant 2007 and so far its been a great car, but recently I've noticed that my car makes a clunking sound when ever I hit a bump. I look underneath the car and saw that the plastic coating is ripped apart this is located as soon as you look under the car. Could this be the reason why my car has been making the clunking sound? If I let it go can it be dangerous to drive? Some one please help me, or is it something serious? Someone please help me