if all birds sing and if they do why do geese honk, ducks quack, and chickens bawk?

I would say not all birds sing, mainly just song birds sing. Lots of other birds don’t sing either like crows, woodpeckers, jays, pelicans, eagles, hawks, owls, etc.

Note: I’m not any kind of bird expert, so it is possible some of the birds that I listed have a song-like call that I’m unfamiliar with or am forgetting about.