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.

as university of miami psychologists debra lieberman and adam smith pointed out in a recent article in the journal current directions in psychological science, humans have social and psychological mechanisms to deter incest. with very few exceptions, marriages between brothers and sisters and between parents and their children are verboten in every human culture. the primary psychological anti-incest mechanism is the yuck response. even the idea of sex with their mom or dad, bro or sis is upsetting to most people. the psychologist jonathan haidt has found that nearly everyone is repelled by the prospect of brother-sister sex, even in hypothetical situations in which there is no chance of pregnancy).

the biological cost of incest

this raises an interesting question: just what’s so bad about incest? sure, having sex with your dad or your sister seems gross — but why? some anthropologists have argued that incest taboos are learned social conventions. this explanation, however, doesn’t make sense to me as it does not explain the widespread existence of anti-incest mechanisms in creatures ranging from cockroaches to chimpanzees. second, the incest taboo is about as close to a universal law as human moral rules get.

why should mechanisms to avoid incest be so widespread both in nature and across human societies? the answer is simple. the problem with having sex close with relatives is that there is an astonishingly high chance that your offspring will be born with a serious birth defect.

the technology changed agriculture in an impacting manner since many people left the field work by a cellular or other technological appliances