I need someone to tell me what is the name of a car part in a Jeep Cherokee.

Sorry I don’t have a photo to post on here. I want to see if I can order it on line. All the dealers near me are a half hours drive away. Okay, the the part I’m looking for is under the drivers side of the car in front of the wheel. It looks like a screwed on flap to the undercarriage. Somehow the flap tore off and now you can see to the coolant holder. Sorry for the non tech names. Anyway. I worry that small animals may find it a cozy place to enter and they may get hurt or damage the engine. It looks almost like the shape of a mud flap only it isn’t one. Seems it may be something that is easily removed to access that area of the engine.