Final answer:
Using strong and unique passwords and PINs for different accounts is a crucial personal security safeguard. It helps protect against unauthorized access and enhances personal information security.
Step-by-step explanation:
Among the options provided, using passwords and PINs that cannot be easily guessed is considered a personal security safeguard.
It is important to create strong, unique passwords for each of your accounts to limit the risk of unauthorized access. Using the same password for all accounts or conducting transactions on non-secure (http) sites increases vulnerability to identity theft and financial fraud.
Personal security safeguards are measures that individuals can take to protect their personal information in the digital world, and they include practices like protecting your credit and debit cards, mailbox, and wallet, as well as utilizing anti-virus software and notifying institutions about changes to your contact information.