Final answer:
Betty's fear of flying due to her vivid memories of the 9/11 attacks best illustrates the impact of flashbulb memories, which are emotionally potent and result in inaccurate perceptions of risk and frequency of such events.
Step-by-step explanation:
The impact that Betty, a US citizen, feels due to her clear memories of the 9/11 terrorist attacks and her subsequent fear of flying illustrates the concept of flashbulb memories and their powerful emotional associations.
Flashbulb memories pertain to atypical and unusual events that are so emotionally potent that they are vividly etched in an individual's memory.
The intense media coverage and repetition of such events can lead to an inaccurate perception of the frequency and risk of similar incidents occurring in the future, thus heightening fear and anxiety about those possibilities, despite their statistical rarity.
These emotional memories can also influence public opinion and social behavior, sometimes leading to more favorable views towards certain groups as well as shifts in political beliefs.