Appropriation occurs when someone uses a name, image or any other form of another person's identity, to make financial gains, without first getting permission from the owner of the identity.
By using Chelsea's photo for an ad, without getting Chelsea's approval first, Beth is liable to Chelsea for appropriation.
Discrimination means unfair treatment given to a specific person or group of people. The different treatment is usually due to the age, sex, religion, race, nationality or other personal characteristics of the person being discriminated against.