Answer:
Availability bias
Step-by-step explanation:
When individual judgement of things which occurs often or on a frequent basis accelerates or widens our thought or belief such that we feel that those things occurs so often than it actually is in reality could be called availability bias. Based on the scenario above, Diane exhibits availability bais based on his judgment that shark related accidents are the most common forns of accident due to the fact that she's been seeing news of shark accidents for a certain period of time.