Final answer:
Phishing is the illegitimate use of an e-mail message that is sent to collect personal information and appears to be from an established organization such as a bank, financial institution, or insurance company.
Step-by-step explanation:
The illegitimate use of an e-mail message that is sent to collect personal information and appears to be from an established organization such as a bank, financial institution, or insurance company is called Phishing. Phishing is a method used by cybercriminals to deceive individuals into providing sensitive information like passwords, bank account numbers, or social security numbers by posing as a trustworthy entity. These fraudulent emails often contain enticing messages or urgent requests to prompt the recipient into taking action.