The exact function of the secretive bats is unknown
locomotion
flight
the function of a baseball bat is a Shell Structure because it has a thin carefully shaped outer layer
to hit a softball.
Used to hit the ball.
mostly flying, but also, it allows the flexing of the bat wrist, to position the bat-fingers so batman can pick his nose
The wing of a butterfly and the wing of a bat can be considered homologous organs. This is because they have the same function.
They are analogous. The function is different, but they have a common ancestoral origin.
A bird has a wing as a forelimb as well as a bat, and the function of both are to help the animals fly