<human>:  What's the difference between a beer, ale, and lager?
<bot>: The main difference between a beer, ale, and lager is the type of yeast used in the brewing process. Beer is the broadest of the three categories, while ales are typically fuller-bodied, with fruity or flowery aromas and flavors. Lagers are typically lighter in color and more carbonated than ales, with more subtle aromas and flavors.