Which sentence contains a nonessential relative clause?

the singer, who was very talented, knew the words to the song.

the singer who was very talented knew the words to the song.

the singer knew the words to the song that she would sing.

the singer remembered the words that were difficult.

you can change by someone having a negative opinon of you in many ways for example thi can lead to depression and taking of ones life also known as sucide this effects there self esteem and ego in a negative way making them feel sad depressed and stressed causing them to act gloomy and sad if this continuses this can lead to self harm or much worse things.

hope i .

hello, answer is ready

answer: kim jong un.