Which of these is a theoretical passage through space creating a shortcut through time and space?

A wormhole is a theoretical passage through space creating a shortcut through time and space. It is not known whether or not they exist.

Scientists believe that if wormholes existed they could not be made following any traditional scientific methods. In order to hold a wormhole open, a form of theoretical exotic matter would be needed. Otherwise the wormhole would simply disappear very quickly after its creation. If plotted on a 2-dimensional plane, the wormhole bends the plane, like folding a paper, so that the two ends would be touching (as seen in the picture). The term wormhole was first used by John Wheeler, a theoretical physicist. It is also known as an Einstein-Rosen bridge. A wormhole is much like a tunnel with two ends each in separate points in space time. Researchers have no observational evidence for wormholes.

Wormholes are a common element in science fiction because they allow rapid interstellar, intergalactic, and sometimes even interuniversal travel. In fiction, wormholes have also served as a method for time travel. This popular fiction allows interstellar travel within human lifetimes. This would allow time travel, also a popular fiction.