Summer Dean was walking through the mall and found a gym bag lying on the ground. The decision Dean must make as to whether to keep the gym bag and its contents for herself or turn it into the mall's lost and found department involves:

Ethics

Explanation:

Ethics also called moral philosophy involves how an individual systemises, defends and recommends the concept of right or wrong.

Summer is facing an ethical decision of either returning the bag or keeping it for herself. Her decision will be based on her definition of right or wrong.

If her moral philosophy is one that does not see theft as something that is wrong, she will decide to keep the bag. If on the other hand she sees keeping the bag that is not her own as wrong she will decide to return it.