You can’t. Just make it harder for her by removing items you can remove and making sure she’s safe around the items you can’t remove. It’s a passing phase but a huge concern

Nothing ! Just make sure that she’s safe. Remove stair gates when she climbs stair gates, secure book cases and cupboards in the wall, have television up high etc And I would suggest to put a climbing frame in the garden and encourage climbing on that.

Not too much you can do to stop it. Prevent as much as you can and then just remain vigilant and always on the lookout to stop any unexpected climbs