Answer: Availability heuristic
Explanation:
Availability heuristic is defined as the raising of instant example in mind regarding any particular situation which is highly relatable to the subject or concept.People judge the situation immediately as the likeliness of occurring event is similar for evaluating example.
According to the question,focusing on celebrity marriage's more often lead to divorce rather than happy marriage because this subject is more highlighted among people through news and media.Thus, people tend to evaluate these situation with celebrity divorce example immediately.So,the scenario depicts about the availability heuristics.