Of all of the topics in humanities, there are many different modes of expression, varying from the art of painting to sculpting, from dance to music, from theatre to poetry. There’s just so many to choose from, it’s impossible to choose just one mode of expression that would fit every humans lifestyle. So the best answer that I can give would be that we use art to cope with the world. Art is something that is all around us, whether one sees art in clothing or on a canvas, in the sky or in a building - art is a part of who we are as a human race.
This world is rough place to live in sometimes but something that has been constant through the ages is art. Whether it is art of motion or art of sound, we use these styles to express feelings and thoughts and ideas.