Identify the correct statement about the expression element of an artwork

Ablank is a type of chord that consists of three pitches on consecutive lines or spacesa. monophonyb. chordc. triadd. natural

Ineed some on finding music. i have a nephew who is into rap, but when i find a rap song, it seems to either be too old for his taste or to him it isn't good enough. can someone suggest some good music for me to see if he likes it or not?

According to the article in wiki answer, digital communication systems have more benefits than analog systems. they are faster and more flexible, and they offer better performance than analog communication