Objective: How do you catch a fish?

Which of the following solutions is more sound in terms of naive physics reasoning?

+ Put a worm on a hook. Make sure you have a bobber. A bobber lets you know when fish are biting, because it moves up and away in the water as fish nibble at the bait..
+ Put a worm on a hook. Make sure you have a bobber. A bobber lets you know when fish are biting, because it moves up and down in the water as fish nibble at the bait..
Put a worm on a hook. Make sure you have a bobber. A bobber lets you know when fish are biting, because it moves up and down in the water as fish nibble at the bait.