How to recognize that car is front wheel drive or rear wheel drive

Hi sir my name is ali and I love cars well I mailing you to ask question a small question that by looking underneath the chassis for car is it possible to recognize that it is rear wheel drive or front wheel drive sir how can I know that my car is rear wheel drive can you give any indication from which I could know that my car is rear wheel drive by looking its under the chassis is there any mechanical part under the chassis from which I could know that it is rear wheel drive car well sir waiting for your humble reply thanks indeed