After graduation, haley's friend zazu went to paris, jeremy went to peru, and ashley went to turkey. haley was only able to go to wild waves water park. this made her sad and is an example of the:

Relative Deprivation Theory.  

Explanation:

Relative deprivation theory talks about a sense of discontent that arises from the perception that we are being deprived of something we would have been entitled to, especially something that we perceive as other individuals or groups with whom we have compared. This 'something' can mean the salary at the end of the month, the possession of material goods, the trips of friends, the recognition of our abilities, etc ... This feeling of deprivation is called 'relative' because it arises precisely by comparison with the situation of individuals or groups of reference.