Science is life. However, that answer is too general, so I will explain how and why it is important. Without science, there would be no Earth. Without science, we would have nothing to wonder about and there would be no life. There are many types of science.
Science stretches our imagination to our wildest dreams.
Biological science brings us to learning about all of the living organisms in life. Among the tiniest of the living organisms, there are cells. We are all made up of trillions and trillions of these microscopic cells. Without the element of biology added to the other major elements that create science, we would not be alive. Another major element of science is Chemistry.