Meaning: This sentence tells us that the man is producing music with his voice.
Choice of Words: The word 'sang' is used to describe the man's vocalization of music. 'Song' refers to the musical piece being sung.
Alternative Expressions
The man sang a beautiful song.
Meaning: This sentence describes a man who is singing a song that is pleasing to the ear.
Choice of Words:Beautiful is an adjective that describes something that is pleasing to the senses, especially to the eye. Song is a noun that refers to a musical composition that is sung.