That depends what you are talking about
As far as I am sure, it contains Songs, Dialouge, dancing, and acting. The emotions are usually "Pathos", love, anger, and humor
If you want your answer combined, it's Music, Songs, Spoken Dialogue, and Dance
1) to repair and maintenance
2) they’re a main source of energy
3)they’re involved in the creation of some hormones
4)enzymes
5)transport and store molecules
6)antibodies