It is safe to tell an online acquaintance (someone you have never met in

person) your

full name.
address.
phone number.
favorite music.

It is generally not safe to share personal information such as your full name, address, or phone number with someone you have never met in person, even if they are an online acquaintance. This information can be used to potentially harm or exploit you. Sharing your favorite music is less sensitive information, but it is still important to exercise caution when disclosing personal details online.