State your favorite(s) between the 3 sciences. Explain why you like them. If you hate all 3 that's fine too. =P
For me I enjoy...
Biology- understanding the marvel at how species have evolved through time starting as single-celled organisms. For organisms to achieve the cell/genetic complexity they have today is pretty cool.
Physics- to fathom how the universe began. How the natural laws of the universe have contributed to things such as gravity. And if you think about it, physics allows you to engage in wondering questions. Does the universe have an end? Are there more universes other than ours? What will happen to the universe in time?