What does it mean to 'share personal information' online?

Sharing personal information online encompasses the act of providing details about oneself that can range from benign to highly sensitive. Choosing to disclose sensitive data, such as Social Security numbers, bank account information, or passwords, can significantly heighten the risk of identity theft. This type of information, if accessed by malicious individuals, can lead to fraudulent activities, unauthorized transactions, and other harmful outcomes.

The other options touch upon various forms of sharing but do not adequately represent the full scope of what constitutes 'sharing personal information' in terms of potential risks. Publishing music and videos may involve sharing creative content but does not necessarily deal with personal identifiers. Posting one's name, address, and phone number without restriction indeed represents a lack of privacy but does not inherently define the urgency of sensitive data disclosures. Similarly, providing information about hobbies and interests is generally safe and does not carry the same risk factors as sensitive personal data. Therefore, the correct answer highlights the critical nature of protecting sensitive information to prevent severe consequences like identity theft.