Beano is a product containing an enzyme that breaks down complex carbohydrates in beans and other vegetables, thereby reducing gas production when these foods are eaten. why would humans need to take beano to avoid gas?

To avoid excess intestinal gas, increase fiber intake gradually.  Use Beano, which contains enzymes to break down undigested carbohydrates before they can be fermented by intestinal bacteria. Intestinal blockage, particularly in combination with low fluid intake. Under normal conditions, human cells obtain a small proportion of their energy needs by converting certain amino acids from proteins into glucose.

an adaptation is a change or process by which an organism takes to be better suited for its environment. for example; migration is a behavioral adaptation, this is needed because birds are not built to last extremely cold climates. there are different adaptations because there are different species needing to adjust to different things, bears don't migrate; they hibernate.